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Rocky Mountain Laboratories

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uuid000hj63

Namestring
Rocky Mountain Laboratories
Legal namestring
Rocky Mountain Laboratories
Websiteurl
rockylabs.com
Company typeenum
Private
Founded yearint
2022
Descriptiontext

Rocky Mountain Laboratories (RML) is a privately held clinical diagnostic laboratory founded in 2022 and headquartered in Draper, Utah. The company provides fee-for-service laboratory testing across seven core disciplines: infectious disease, toxicology, chemistry, immunology, hematology, microscopy, and coagulation, with a catalog of over 1,000 individual tests including specialized panels for respiratory, women's health, wound, UTI, and drug screening. Its molecular testing capability is anchored in real-time PCR/RT-PCR for rapid pathogen detection, genetic profiling, infectious disease identification, and metabolic health assessment.

The laboratory serves two primary customer segments — healthcare providers (physicians, clinics, hospitals, healthcare systems) and individual patients — through a direct-to-consumer and direct-to-provider model. Specimen collection is handled via same-day courier pickup (prior to 9PM MST weekdays, 8PM weekends) and dispatched phlebotomist visits (7AM-3PM within 48 hours of request), with online portals supporting service requests and 24/7 bill payment. Six operational service locations span Utah, Nevada, Idaho, Colorado, Arizona, and Texas, positioning the company across the Mountain West, Southwest, and Intermountain West geographies.

The business model is purely transactional: revenue is generated per test performed with no subscription or recurring contract component. Pricing is not publicly disclosed and customers contact the laboratory directly for test costs. The company operates without disclosed external investors, parent entities, M&A activity, patents, or partnerships, suggesting a founder-led or closely held ownership structure. Marketing is conducted primarily through the company website, direct email and phone outreach, and organic social media channels, with no disclosed enterprise sales motion or named anchor accounts.

Short descriptiontext

Rocky Mountain Laboratories is a privately held clinical diagnostic laboratory offering molecular PCR/RT-PCR testing and a 1,000+ test menu spanning infectious disease, toxicology, chemistry, immunology, hematology, microscopy, and coagulation. It serves healthcare providers and patients across six western US states via courier and phlebotomist collection services.

Operating statusenum
Operating
Ownership categoryenum
Headcount rangeband
11–50
akta.pro rankint
HeadquartersDraper, United States
HQ citystring
Draper
HQ countrystring
United States
HQ regionstring
North America
Markets served

Serves global market

Offices6 records

Each record includes

City, Country, Type, Description, Source

Keyword5 values
clinical laboratory services, molecular diagnostic testing, infectious disease testing, phlebotomy services, toxicology screening
Industry3 codes
1Clinical Chemistry & Immunoassay Laboratories
CodeHLAFAMABPrimaryYes
2Reference & Esoteric Testing Laboratories
CodeHLAFAMAJPrimaryNo
3Molecular & Genetic Testing (PCR/NGS/qPCR)
CodeHLAGADAFPrimaryNo
NAICS code1 code
  • Medical Laboratories621511
SIC code1 code
  • Services-Medical Laboratories8071
Product category
Clinical Diagnostic Laboratory Services
GTM motion1 record

Each record includes

Type, Description, Source

Revenue model1 record
1Laboratory Testing Services
TypeTransaction Fee
Description

Fee-for-service laboratory testing model where healthcare providers and patients pay for individual diagnostic tests. Services include molecular testing, chemistry panels, infectious disease screening, toxicology, and specialized diagnostic panels. Revenue is generated per test performed with no subscription component.

rockylabs.com
Marketing channels3 records

Each record includes

Title, Type, Stage, Description, Source

Distribution channels3 records

Each record includes

Title, Type, Scope, Target buyer, Description, Source

Cost components6 values
Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales
GTM typeB2B and B2C
B2B and B2C
Offering typeServices
Services
Core offering1 text field

Rocky Mountain Laboratories is a clinical diagnostic laboratory that performs molecular testing (PCR/RT-PCR) and a multi-discipline test menu spanning infectious disease, toxicology, chemistry, immunology, hematology, microscopy, and coagulation for healthcare providers and individual patients. The company operates same-day courier pickup and dispatched phlebotomist collection services across six locations in the U.S. Mountain West and Southwest, with results delivered via an online portal and bill payment handled through a 24/7 online payment system.

Differentiator
Functional benefit
Problem solved
Product overview1 text field

Rocky Mountain Laboratories (RML) operates as a clinical diagnostic laboratory offering a unified platform of laboratory services built around precision diagnostics and compassionate patient care. The core offering consists of the RML Laboratory Services platform, which provides molecular testing (PCR/RT-PCR), a comprehensive test menu spanning infectious disease, toxicology, chemistry, immunology, hematology, and other specialties, supported by service request and payment modules. The Molecular Test Menu enables rapid pathogen detection and genetic profiling, while the broader test catalog includes specialized panels (women's health, wound, respiratory, UTI) and individual assays. All services are tied together through online portals for scheduling, payments, and results access.

Product and service3 records
1RML Laboratory Services
CategoryClinical Laboratory Services
Description

A comprehensive clinical laboratory service offering precision diagnostics across multiple disciplines including Infectious Disease, Toxicology, Chemistry, Immunology, Hematology, Microscopy, and Coagulation for healthcare providers and individual patients. Includes sample pickup scheduling, phlebotomist dispatch, and online results access.

2Molecular Test Menu (PCR/RT-PCR)
CategoryMolecular Diagnostic Testing
Description

Real-time Polymerase Chain Reaction (PCR/RT-PCR) molecular testing for rapid detection of pathogens, genetic profiling, infectious disease identification, and metabolic health assessment. Enables targeted treatment plans through actionable molecular diagnostics for healthcare providers and patients.

3Comprehensive Test Menu
CategoryClinical Laboratory Services
Description

Extensive catalog of more than 1,000 individual laboratory tests spanning categories such as respiratory panels, women's health panels, wound cultures, infectious disease markers, drug screening, genetic testing, and specialty assays. Enables healthcare providers to consolidate multiple specialty testing vendors into a single laboratory partner.

Recent move5 records

Each record includes

Date, Type, Title, Description, Source

Expansion highlight4 records

Each record includes

Type, Description

Peers10 records
TypeBroad incumbent
Description

Global testing-services group with significant clinical diagnostics operations across multiple geographies. Overlaps with RML on routine and molecular clinical testing delivered at multi-site scale, though Eurofins operates a much broader non-clinical testing portfolio.

TypeRegional player
Description

Southeast U.S.-headquartered pathology and clinical lab network providing anatomic, molecular, and routine diagnostics to hospitals and physicians. Comparable as a regional clinical lab operator with a broad test menu, though geographically concentrated in the Southeast rather than the Mountain West.

TypeEmerging player
Description

Molecular diagnostics specialist focused on genetic testing for hereditary cancer, women's health, and pharmacogenomics. Comparable in molecular/PCR-based testing orientation, though narrower in menu depth and more specialty-focused than RML's general clinical lab offering.

TypeDirect peer
Description

Albuquerque-based regional reference laboratory serving New Mexico and the Southwest with routine and esoteric diagnostics. Comparable as a regional reference lab with multi-site service and similar Mountain West / Southwest geography overlap.

TypeBroad incumbent
Description

National clinical laboratory leader offering the full routine and esoteric test menu including molecular diagnostics. Directly competes for healthcare-provider test-order volume and patient self-pay, but operates at vastly greater scale and with nationwide payer contracts that RML must compete against.

TypeBroad incumbent
Description

Global clinical lab operator with multi-state and multi-region footprints in the U.S. (e.g., Sonic Healthcare USA) offering routine and esoteric diagnostics. Relevant as a multi-region clinical lab operator running decentralized service networks, mirroring RML's distributed location strategy.

TypeEmerging player
Description

Specialty clinical lab focused on oncology and hematology molecular testing, with growing general diagnostic capabilities. Overlaps with RML on the molecular diagnostics side and the hematology portion of RML's test menu, though concentrated in oncology rather than general clinical testing.

TypeBroad incumbent
Description

One of the two largest U.S. clinical lab networks with comprehensive routine and specialty testing including molecular diagnostics. Overlaps directly with RML's provider-facing testing services and broad test menu, though at national scale with established payer and physician relationships.

TypeDirect peer
Description

Clinical and molecular diagnostics laboratory offering routine and specialty testing to providers and patients across multiple regions. Comparable as a multi-regional clinical lab with both provider and direct-to-patient access models and an emphasis on molecular/esoteric testing.

TypeDirect peer
Description

Salt Lake City-based nonprofit reference laboratory offering routine chemistry, esoteric, and molecular diagnostics across the U.S. Strongly comparable as a Utah-headquartered clinical lab with a broad test menu including molecular testing, serving a Mountain West catchment area that overlaps RML's.

Market position
Strengths4 records

Each record includes

Headline, Details, Source

Weaknesses4 records

Each record includes

Headline, Details, Source

Competitive moat3 records

Each record includes

Type, Details

Key risks6 records

Each record includes

Headline, Details, Source

Key highlights5 records

Each record includes

Headline, Details, Source

Customer concentration

Classification, Details

Segment2 records

Each record includes

Title, Type, Primary, Description, Pain point addressed, Use case, Source

Ideal customer profile2 records

Each record includes

Profile, Firmographic size, Sales motion, Sales cycle length, Buying structure, Purchase trigger, Buyer persona, Geography, Industry vertical, Primary use case, Description, Pain points, Evidence proof points, Target buyer

Technology focused
No
API detail
Has APIbool
No

Docs URL, Description

AI maturity
App detail

Has app

Feature2 records

Each record includes

Title, Differentiator, Description, Source

Core technology
Revenue estimate
Valuation estimate
Number of profiles
No data
No data
Funding overview

Funding stage, Last funding date, Total funding USD

Funding rounds

Each record includes

Round, Amount USD, Date, Pre money valuation, Total investors, Investors, News

Investors

Each record includes

Name, Type, Date of entry, Rounds participated, Website

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Each record includes

Name, Acquisition type, Announced date, Completed date, Status, Website, News

Investment

Each record includes

Name, Round, Announced date, Lead investor, Website, News

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Rocky Mountain Laboratories

Clinical Diagnostic Laboratory Servicesrockylabs.com

Rocky Mountain Laboratories is a privately held clinical diagnostic laboratory offering molecular PCR/RT-PCR testing and a 1,000+ test menu spanning infectious disease, toxicology, chemistry, immunology, hematology, microscopy, and coagulation. It serves healthcare providers and patients across six western US states via courier and phlebotomist collection services.

What Rocky Mountain Laboratories does

Rocky Mountain Laboratories (RML) is a privately held clinical diagnostic laboratory founded in 2022 and headquartered in Draper, Utah. The company provides fee-for-service laboratory testing across seven core disciplines: infectious disease, toxicology, chemistry, immunology, hematology, microscopy, and coagulation, with a catalog of over 1,000 individual tests including specialized panels for respiratory, women's health, wound, UTI, and drug screening. Its molecular testing capability is anchored in real-time PCR/RT-PCR for rapid pathogen detection, genetic profiling, infectious disease identification, and metabolic health assessment.

The laboratory serves two primary customer segments — healthcare providers (physicians, clinics, hospitals, healthcare systems) and individual patients — through a direct-to-consumer and direct-to-provider model. Specimen collection is handled via same-day courier pickup (prior to 9PM MST weekdays, 8PM weekends) and dispatched phlebotomist visits (7AM-3PM within 48 hours of request), with online portals supporting service requests and 24/7 bill payment. Six operational service locations span Utah, Nevada, Idaho, Colorado, Arizona, and Texas, positioning the company across the Mountain West, Southwest, and Intermountain West geographies.

The business model is purely transactional: revenue is generated per test performed with no subscription or recurring contract component. Pricing is not publicly disclosed and customers contact the laboratory directly for test costs. The company operates without disclosed external investors, parent entities, M&A activity, patents, or partnerships, suggesting a founder-led or closely held ownership structure. Marketing is conducted primarily through the company website, direct email and phone outreach, and organic social media channels, with no disclosed enterprise sales motion or named anchor accounts.

Rocky Mountain Laboratories firmographics

Firmographics
Name
Rocky Mountain Laboratories
Legal name
Rocky Mountain Laboratories
Website
https://rockylabs.com
Company type
Private
Founded year
2022
Operating status
Operating
Headcount range
11–50 employees
Short description
Rocky Mountain Laboratories is a privately held clinical diagnostic laboratory offering molecular PCR/RT-PCR testing and a 1,000+ test menu spanning infectious disease, toxicology, chemistry, immunology, hematology, microscopy, and coagulation. It serves healthcare providers and patients across six western US states via courier and phlebotomist collection services.
Ownership category
akta.pro rank

Rocky Mountain Laboratories industry classification

Industry
Product category
Clinical Diagnostic Laboratory Services
NAICS
Medical Laboratories (621511)
SIC
Services-Medical Laboratories (8071)
akta.pro primary industry
Clinical Chemistry & Immunoassay Laboratories (HLAFAMAB)
akta.pro secondary industries
Reference & Esoteric Testing Laboratories (HLAFAMAJ), Molecular & Genetic Testing (PCR/NGS/qPCR) (HLAGADAF)

Keywords

  • Clinical laboratory services
  • Molecular diagnostic testing
  • Infectious disease testing
  • Phlebotomy services
  • Toxicology screening

Where Rocky Mountain Laboratories is headquartered

Location

Headquarters

HQ city
Draper
HQ country
United States
HQ region
North America

Offices6 records

Markets served

Rocky Mountain Laboratories business model

Business model
GTM type
B2B and B2C
Offering type
Services
Cost components
Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

  1. Laboratory Testing Services: Fee-for-service laboratory testing model where healthcare providers and patients pay for individual diagnostic tests. Services include molecular testing, chemistry panels, infectious disease screening, toxicology, and specialized diagnostic panels. Revenue is generated per test performed with no subscription component.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Rocky Mountain Laboratories product offering

Product offering

Core offering

Rocky Mountain Laboratories is a clinical diagnostic laboratory that performs molecular testing (PCR/RT-PCR) and a multi-discipline test menu spanning infectious disease, toxicology, chemistry, immunology, hematology, microscopy, and coagulation for healthcare providers and individual patients. The company operates same-day courier pickup and dispatched phlebotomist collection services across six locations in the U.S. Mountain West and Southwest, with results delivered via an online portal and bill payment handled through a 24/7 online payment system.

Product overview

Rocky Mountain Laboratories (RML) operates as a clinical diagnostic laboratory offering a unified platform of laboratory services built around precision diagnostics and compassionate patient care. The core offering consists of the RML Laboratory Services platform, which provides molecular testing (PCR/RT-PCR), a comprehensive test menu spanning infectious disease, toxicology, chemistry, immunology, hematology, and other specialties, supported by service request and payment modules. The Molecular Test Menu enables rapid pathogen detection and genetic profiling, while the broader test catalog includes specialized panels (women's health, wound, respiratory, UTI) and individual assays. All services are tied together through online portals for scheduling, payments, and results access.

Differentiator

Problem solved

Functional benefit

Products and services

  • RML Laboratory Services A comprehensive clinical laboratory service offering precision diagnostics across multiple disciplines including Infectious Disease, Toxicology, Chemistry, Immunology, Hematology, Microscopy, and Coagulation for healthcare providers and individual patients. Includes sample pickup scheduling, phlebotomist dispatch, and online results access.
  • Molecular Test Menu (PCR/RT-PCR) Real-time Polymerase Chain Reaction (PCR/RT-PCR) molecular testing for rapid detection of pathogens, genetic profiling, infectious disease identification, and metabolic health assessment. Enables targeted treatment plans through actionable molecular diagnostics for healthcare providers and patients.
  • Comprehensive Test Menu Extensive catalog of more than 1,000 individual laboratory tests spanning categories such as respiratory panels, women's health panels, wound cultures, infectious disease markers, drug screening, genetic testing, and specialty assays. Enables healthcare providers to consolidate multiple specialty testing vendors into a single laboratory partner.

Companies that use Rocky Mountain Laboratories

Customer profile

Segments2 records

Ideal customer profiles2 records

Rocky Mountain Laboratories technology and API

Technology

Technology focussed No

API detail

Has API
No
API docs
API detail

Core technology

AI maturity

App detail

Feature2 records

Rocky Mountain Laboratories partnerships and signals

Strategic signal

Recent moves5 records

Expansion highlights4 records

Rocky Mountain Laboratories competitors and assessment

Company assessment

Broad incumbents

  • Eurofins Scientific: Global testing-services group with significant clinical diagnostics operations across multiple geographies. Overlaps with RML on routine and molecular clinical testing delivered at multi-site scale, though Eurofins operates a much broader non-clinical testing portfolio.
  • Quest Diagnostics: National clinical laboratory leader offering the full routine and esoteric test menu including molecular diagnostics. Directly competes for healthcare-provider test-order volume and patient self-pay, but operates at vastly greater scale and with nationwide payer contracts that RML must compete against.
  • Sonic Healthcare: Global clinical lab operator with multi-state and multi-region footprints in the U.S. (e.g., Sonic Healthcare USA) offering routine and esoteric diagnostics. Relevant as a multi-region clinical lab operator running decentralized service networks, mirroring RML's distributed location strategy.
  • Laboratory Corporation of America (Labcorp): One of the two largest U.S. clinical lab networks with comprehensive routine and specialty testing including molecular diagnostics. Overlaps directly with RML's provider-facing testing services and broad test menu, though at national scale with established payer and physician relationships.

Regional players

  • PathGroup: Southeast U.S.-headquartered pathology and clinical lab network providing anatomic, molecular, and routine diagnostics to hospitals and physicians. Comparable as a regional clinical lab operator with a broad test menu, though geographically concentrated in the Southeast rather than the Mountain West.

Emerging players

  • Myriad Genetics: Molecular diagnostics specialist focused on genetic testing for hereditary cancer, women's health, and pharmacogenomics. Comparable in molecular/PCR-based testing orientation, though narrower in menu depth and more specialty-focused than RML's general clinical lab offering.
  • NeoGenomics: Specialty clinical lab focused on oncology and hematology molecular testing, with growing general diagnostic capabilities. Overlaps with RML on the molecular diagnostics side and the hematology portion of RML's test menu, though concentrated in oncology rather than general clinical testing.

Direct peers

  • TriCore Reference Laboratories: Albuquerque-based regional reference laboratory serving New Mexico and the Southwest with routine and esoteric diagnostics. Comparable as a regional reference lab with multi-site service and similar Mountain West / Southwest geography overlap.
  • BioReference Laboratories: Clinical and molecular diagnostics laboratory offering routine and specialty testing to providers and patients across multiple regions. Comparable as a multi-regional clinical lab with both provider and direct-to-patient access models and an emphasis on molecular/esoteric testing.
  • ARUP Laboratories: Salt Lake City-based nonprofit reference laboratory offering routine chemistry, esoteric, and molecular diagnostics across the U.S. Strongly comparable as a Utah-headquartered clinical lab with a broad test menu including molecular testing, serving a Mountain West catchment area that overlaps RML's.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights5 records

Customer concentration

Rocky Mountain Laboratories social profiles

Digital presence

Rocky Mountain Laboratories financial estimates

Financial estimate

Revenue estimate

Valuation estimate

Rocky Mountain Laboratories leadership team

Management profile

Number of profiles

Rocky Mountain Laboratories funding detail

Funding detail

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

Rocky Mountain Laboratories M&A and investment

M&A and investment

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Rocky Mountain Laboratories

What does Rocky Mountain Laboratories do?

Rocky Mountain Laboratories is a clinical diagnostic laboratory that performs molecular testing (PCR/RT-PCR) and a multi-discipline test menu spanning infectious disease, toxicology, chemistry, immunology, hematology, microscopy, and coagulation for healthcare providers and individual patients. The company operates same-day courier pickup and dispatched phlebotomist collection services across six locations in the U.S. Mountain West and Southwest, with results delivered via an online portal and bill payment handled through a 24/7 online payment system.

Is Rocky Mountain Laboratories a public or private company?

Rocky Mountain Laboratories is a private company. It is classified as founder individual operated bootstrapped and is currently operating.

When was Rocky Mountain Laboratories founded?

Rocky Mountain Laboratories was founded in 2022. It employs 11 to 50 people.

Where is Rocky Mountain Laboratories based?

Rocky Mountain Laboratories is headquartered in Draper, United States, in the North America region.

How does Rocky Mountain Laboratories make money?

One revenue line is on record: laboratory Testing Services.

Who are Rocky Mountain Laboratories's main competitors?

Broad incumbents on record are Eurofins Scientific, Quest Diagnostics, Sonic Healthcare and Laboratory Corporation of America (Labcorp). PathGroup is listed as a regional player. Emerging players are Myriad Genetics and NeoGenomics. Direct peers are TriCore Reference Laboratories, BioReference Laboratories and ARUP Laboratories.

Does Rocky Mountain Laboratories have an API?

No public API is recorded for Rocky Mountain Laboratories.

What industry is Rocky Mountain Laboratories in?

Rocky Mountain Laboratories's product category is Clinical Diagnostic Laboratory Services. Its primary akta.pro industry code is HLAFAMAB, Clinical Chemistry & Immunoassay Laboratories, with a secondary code of HLAFAMAJ, Reference & Esoteric Testing Laboratories. Its NAICS code is 621511 and its SIC code is 8071.

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Live signals
Billings GazetteAfter an infected monkey bit an RML worker, report finds protocols need updatingA report indicates that safety protocols at Rocky Mountain Laboratories (RML) require updating following an incident where a worker was bitten by an infected monkey. The findings were discussed at a Ravalli County Board of Health meeting attended by approximately 50 people in June. The event has sparked local community response, including protests both supporting and questioning the laboratory's operations.Billings GazetteCommunity members rally to support Rocky Mountain Laboratories employees in HamiltonAround 25 community members gathered Friday in Hamilton, Montana to rally in support of Rocky Mountain Laboratories employees, a federal biomedical research facility that has faced funding cuts over the past year and ongoing controversy following the June arrest of two lab scientists. Dr. Marshall Bloom from the lab greeted supporters who lined the sidewalks outside the campus carrying signs expressing solidarity. The demonstration reflects local backing for the facility amid broader federal research budget reductions.AP News2 scientists charged with bringing deactivated mpox virus into the US and lying to authoritiesTwo scientists at a U.S. government lab were charged with smuggling vials of deactivated mpox virus into the country from Africa and lying to investigators at a Michigan airport. The criminal complaint was unsealed in federal court in Detroit against Vincent Munster and Claude Kwe, who denied returning with biological materials. They are expected to appear in federal court in Missoula, Montana, on Wednesday.POLITICOMontana senator wants monkey bite, and lab where it happened, investigatedRepublican Sen. Tim Sheehy of Montana has requested an HHS inspector general review of the Rocky Mountain Laboratories federal research facility after a monkey infected with Crimean-Congo hemorrhagic fever bit a researcher there in November 2025, though the worker was treated and did not contract the disease. Conservative activist Laura Loomer and animal welfare group White Coat Waste have pushed for the investigation, with Loomer claiming to have spoken directly with Health Secretary Robert F. Kennedy Jr. about specific scientists she wants fired. Republican lawmakers including Sens. Ernst and Scott are using the incident to renew calls for cutting NIH funding, citing concerns about potential lab leaks.The Times of IndiaHantavirus scientists were close to vaccine but ran out of money - The Economic TimesScientists in Chile, working primarily at Universidad de Concepción, developed monoclonal antibodies that successfully neutralised the Andes hantavirus in lab and animal studies between 2016-2018, achieving a breakthrough that led to orphan drug status from the US FDA, but the project stalled before human trials due to insufficient funding and the Covid-19 pandemic. A recent outbreak on the MV Hondius cruise ship departing from Argentina, which has left multiple people dead and passengers from 23 countries exposed, has renewed global attention to the virus that kills approximately one-in-three infected people. The research team, which collaborated with Rocky Mountain Laboratories, the Robert Koch Institute, and Ichor Biologics, estimates it would need $7 million and 12-24 months to resume the progress lost during the pandemic.PR NewswireHost Genetic Backgrounds Underlie Variable COVID-19 PathologyResearchers at The Jackson Laboratory and Rocky Mountain Laboratories conducted a study using genetically diverse mouse models to investigate why COVID-19 severity varies among individuals, finding that host genetic factors significantly influence disease response. The study created nine hybrid mouse strains expressing human ACE2 receptors and infected them with SARS-CoV-2, revealing a broad spectrum of disease severity, with some strains highly susceptible and others resistant, plus notable sex-based differences in outcomes. The findings offer a preclinical platform for linking disease susceptibility to genetic background, potentially enabling predictive tests for rapid COVID-19 diagnosis and therapeutic interventions.