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Infectious Diseases
An illness caused by an infectious agent or its toxins that occurs through the direct or indirect transmission of the infectious agent or its products from an infected individual or via an animal, vector or the inanimate environment to a susceptible animal or human host. Examples include, but are not limited to, Influenza; COVID-19; HIV; Avian Flu; Mpox; Anthrax, and others.
National Center for Emerging and Zoonotic Infectious Diseases (U.S.).
2026/05/10
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National Center for Emerging and Zoonotic Infectious Diseases (NCEZID)
Purpose: The purpose of this document is to support health departments in managing individuals who have experienced a potential exposure associated with the M/V Hondius Andes virus outbreak. Andes virus is a type of hantavirus and the only type that is known to spread person-to-person.This interim guidance reflects current evidence as of May 10, 20
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CurrentSupporting FilesPublic Domain
National Center for Emerging and Zoonotic Infectious Diseases (U.S.). (2026). Interim Guidance for Public Health Assessment and Management of People with Potential Exposure to Andes Virus. Array.
National Center for Emerging and Zoonotic Infectious Diseases (U.S.). "Interim Guidance for Public Health Assessment and Management of People with Potential Exposure to Andes Virus" Array (2026)
National Center for Emerging and Zoonotic Infectious Diseases (U.S.). "Interim Guidance for Public Health Assessment and Management of People with Potential Exposure to Andes Virus" Array, , 2026
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (U.S.). Division of HIV/AIDS Prevention
2026/05/07
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HIV Surveillance Report
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XLSX Spreadsheet file
National Center for HIV, Viral Hepatitis, STD, and Tuberculosis Prevention (NCHHSTP)
The Ending the HIV Epidemic in the U.S. (EHE) initiative leverages critical scientific advances in HIV prevention, diagnosis, treatment, and outbreak response. These tables provide preliminary data on HIV diagnoses and linkage to HIV medical care for the years 2017-2024 and preliminary data for 2025 based on cases reported to CDC as of December 202
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DatasetSupporting Files
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (U.S.). Division of HIV/AIDS Prevention (2026). Core Indicators for Monitoring the Ending the HIV Epidemic Initiative, Preliminary Data Through December 2025 [Tables]. 2026https://doi.org/10.15620/256157
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (U.S.). Division of HIV/AIDS Prevention "Core Indicators for Monitoring the Ending the HIV Epidemic Initiative, Preliminary Data Through December 2025 [Tables]" 2026 (2026), https://doi.org/10.15620/256157
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (U.S.). Division of HIV/AIDS Prevention "Core Indicators for Monitoring the Ending the HIV Epidemic Initiative, Preliminary Data Through December 2025 [Tables]" vol. 2026, 2026, https://doi.org/10.15620/256157
Centers for Disease Control and Prevention (CDC) (U.S.)
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2026/05/06
Andes Virus: A hantavirus spread by rodents in South America that can cause a severe respiratory disease in people, called Hantavirus Pulmonary Syndrome (HPS). The handout includes how Andes virus spreads; the symptoms; and, prevention and treatment.If you may have had contact with a person with Andes virus and are experiencing symptoms, contact a
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Supporting FilesPublic Domain
Centers for Disease Control and Prevention (CDC) (U.S.) (2026). Andes Virus [2026/05/06].
Centers for Disease Control and Prevention (CDC) (U.S.) "Andes Virus [2026/05/06]" (2026)
Centers for Disease Control and Prevention (CDC) (U.S.) "Andes Virus [2026/05/06]" , 2026
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases
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2026/05/05
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Be Ready for Measles Toolkit
The purpose of this document is to provide a checklist of key activities that state, tribal, local, and territorial jurisdictions should consider to be prepared for a potential measles cluster or outbreak. If all these activities are not feasible to complete prior to the identification of a measles case or outbreak detection for preparedness purpos
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Supporting FilesPublic Domain
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases (2026). Preparedness Checklist for Public Health: Measles Clusters and Outbreaks.
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Preparedness Checklist for Public Health: Measles Clusters and Outbreaks" (2026)
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Preparedness Checklist for Public Health: Measles Clusters and Outbreaks" , 2026
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases
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2026/05/04
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Be Ready for Measles Toolkit
Why Should Summer Camps Prepare for Measles? Measles is caused by a highly contagious virus that spreads through the air when an infected person coughs or sneezes. If one person has measles, up to 9 in 10 people nearby will become infected if they are not protected through vaccination or previous infection.Measles can spread quickly in summer camps
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Supporting FilesPublic Domain
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases (2026). Preparing and Responding to Measles: Checklist for Summer Camps.
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Preparing and Responding to Measles: Checklist for Summer Camps" (2026)
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Preparing and Responding to Measles: Checklist for Summer Camps" , 2026
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases
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2026/05/04
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Be Ready for Measles Toolkit
Immune globulin post-exposure prophylaxis (IG PEP) should not be used to control measles outbreaks, but rather to reduce the risk for infection and complications in certain vulnerable populations. Healthcare providers should provide appropriate measles PEP in coordination with local or state health departments. What is post-exposure prophylaxis for
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Supporting FilesPublic Domain
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases (2026). Immune globulin for Measles Post-Exposure Prophylaxis.
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Immune globulin for Measles Post-Exposure Prophylaxis" (2026)
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Immune globulin for Measles Post-Exposure Prophylaxis" , 2026
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases
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2026/05/01
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Be Ready for Measles Toolkit
Qué hacer si crees que tu hijo tiene sarampión: El sarampión suele empezar con fiebre, tos, moco nasal y ojos rojos que provocan un sarpullido. Si alguien en tu familia tiene síntomas de sarampión. Manténlos alejados de familiares que no estén enfermos. Todos en casa deberían quedarse en casa para que no se mareen a tus vecinos ni a personas de fue
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Supporting FilesPublic Domain
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases (2026). ¿Cree que su Hijo tiene Sarampión?.
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "¿Cree que su Hijo tiene Sarampión?" (2026)
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "¿Cree que su Hijo tiene Sarampión?" , 2026
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases
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2026/05/01
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Be Ready for Measles Toolkit
El sarampión es una enfermedad muy contagiosa causada por un virus. Puede ser peligroso, especialmente para los bebés y los niños pequeños. Proteja a su familia y a su comunidad.El sarampión se propaga por el aire cuando una persona enferma tose o estornuda. El virus puede permanecer en el aire durante 2 horas después de que la persona con sarampió
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Supporting FilesMulti-LanguagePublic Domain
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases (2026). Hay un Brote Actual de Sarampión.
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Hay un Brote Actual de Sarampión" (2026)
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Hay un Brote Actual de Sarampión" , 2026
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases
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2026/05/01
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Be Ready for Measles Toolkit
This flyer is intended for clinic, office, or pharmacy MMR Vaccination availability or for vaccination events.Measles can be dangerous, especially for babies and young children. The best protection against measles is the measles, mumps and rubella (MMR) vaccine. Protect yourself, your family and your community. MMR Vaccination is Available.Be Ready
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Supporting FilesMulti-LanguagePublic Domain
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases (2026). There's a Current Outbreak of Measles: MMR Vaccination is Available.
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "There's a Current Outbreak of Measles: MMR Vaccination is Available" (2026)
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "There's a Current Outbreak of Measles: MMR Vaccination is Available" , 2026
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases
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2026/05/01
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Be Ready for Measles Toolkit
Measles can be dangerous, especially for babies and young children. Severe measles can lead to hospitalization and even death. Measles is still common in many parts of the world. Anyone who is not fully vaccinated against measles and travels internationally—or to a place with a measles outbreak—is at risk. You can protect yourself and your children
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Supporting FilesMulti-LanguagePublic Domain
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases (2026). Preventing Measles Before and After Travel.
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Preventing Measles Before and After Travel" (2026)
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Preventing Measles Before and After Travel" , 2026
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases
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2026/05/01
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Be Ready for Measles Toolkit
El sarampión puede ser peligroso, especialmente para bebés y niños pequeños. El sarampión grave puede provocar hospitalización e incluso la muerte. El sarampión sigue siendo común en muchas partes del mundo. Cualquiera que no esté completamente vacunado contra el sarampión y viaje al extranjero—o a un lugar con brote de sarampión—está en riesgo. Pu
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Supporting FilesMulti-LanguagePublic Domain
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases (2026). Prevención del Sarampión antes y después de viajar.
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Prevención del Sarampión antes y después de viajar" (2026)
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Prevención del Sarampión antes y después de viajar" , 2026
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases
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2026/05/01
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Be Ready for Measles Toolkit
Overview: MMR vaccination is the best way to prevent measles and its complications. There is no specific antiviral therapy that is approved by the Food and Drug Administration (FDA-approved)for management of measles. Medical care is generally supportive to help relieve symptoms. Measles can cause serious illness requiring hospitalization, and compl
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Supporting FilesPublic Domain
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases (2026). Measles Prevention and Treatment Overview: Information for Healthcare Providers.
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Measles Prevention and Treatment Overview: Information for Healthcare Providers" (2026)
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Measles Prevention and Treatment Overview: Information for Healthcare Providers" , 2026
This report presents results of the U.S. Centers for Disease Control and Prevention Model Performance Evaluation Program for Mycobacterium tuberculosis complex drug susceptibility testing panel sent to participants in March 2025.The Model Performance Evaluation Program (MPEP) is an educational, self-assessment tool in which five isolates of M. tube
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Public Domain
Stafford, Cortney (2026). Mycobacterium tuberculosis Complex Drug Susceptibility Testing Program: Model Performance Evaluation Program Report of Results, August 2025.
Stafford, Cortney "Mycobacterium tuberculosis Complex Drug Susceptibility Testing Program: Model Performance Evaluation Program Report of Results, August 2025" (2026)
Stafford, Cortney "Mycobacterium tuberculosis Complex Drug Susceptibility Testing Program: Model Performance Evaluation Program Report of Results, August 2025" , 2026
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases
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2026/04/27
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Be Ready for Measles Toolkit
Este folleto está destinado a la disponibilidad de vacunación triple vírica vírica en clínicas, oficinas o farmacias, o para eventos de vacunación.El sarampión puede ser peligroso, especialmente para bebés y niños pequeños. La mejor protección contra el sarampión es la vacuna contra el sarampión, paperas y rubéola (MMR).Protégete a ti mismo, a tu f
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Supporting FilesMulti-LanguagePublic Domain
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases (2026). Hay un Brote Actual de Sarampión: La vacuna MMR esta Disponible.
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Hay un Brote Actual de Sarampión: La vacuna MMR esta Disponible" (2026)
National Center for Immunization and Respiratory Diseases. Division of Viral Diseases "Hay un Brote Actual de Sarampión: La vacuna MMR esta Disponible" , 2026
National Center for Immunization and Respiratory Diseases (U.S.)
2026/04/21
ABCs Areas: California (3 county San Francisco Bay area); Colorado (5 county Denver area); Connecticut; Georgia; Maryland; Minnesota; New Mexico; New York (15 county Rochester and Albany areas); Oregon; Tennessee (20 counties)ABCs Population: The surveillance areas represent 46,473,142 persons.Source: Census Bureau's Vintage 2024 population estimat
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Public Domain
National Center for Immunization and Respiratory Diseases (U.S.) (2026). Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Neisseria meningitidis, 2024.
National Center for Immunization and Respiratory Diseases (U.S.) "Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Neisseria meningitidis, 2024" (2026)
National Center for Immunization and Respiratory Diseases (U.S.) "Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Neisseria meningitidis, 2024" , 2026
National Center for Immunization and Respiratory Diseases (U.S.)
2026/04/21
ABCs Areas: California (3 county San Francisco Bay area); Colorado (5 county Denver area); Connecticut; Georgia (20 county + State <1 year); Maryland; Minnesota; New Mexico; New York (15 county Rochester and Albany areas); Oregon (3 county Portland area); Tennessee (20 counties).ABCs Population: The surveillance areas represent 39,096,896 persons and 465,845 live births. Source: Census Bureau's Vintage 2024 population estimates and natality data from National Center for Health Statistics (NCHS).ABCs Case Definition: Invasive bacterial disease is defined as isolation of group B Streptococcus from a normally sterile site or detection of ABCs pathogen-specific nucleic acid in a specimen obtained from a normally sterile body site, using a validated molecular test in a resident of one of the surveillance areas. Early‑onset cases occur at <7 days old and late‑onset between 7 and 89 days old.Citation: Centers for Disease Control and Prevention. 2024. Active Bacterial Core Surveillance Report, Emerging Infections Program Network, Group B Streptococcus, 2024. www.cdc.gov/abcs/downloads/GBS_Surveillance_Report_2024.pdf
Public Domain
National Center for Immunization and Respiratory Diseases (U.S.) (2026). Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Group B Streptococcus, 2024.
National Center for Immunization and Respiratory Diseases (U.S.) "Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Group B Streptococcus, 2024" (2026)
National Center for Immunization and Respiratory Diseases (U.S.) "Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Group B Streptococcus, 2024" , 2026
National Center for Immunization and Respiratory Diseases (U.S.)
2026/04/21
ABCs Areas: California (3 county San Francisco Bay area); Colorado (5 county Denver area); Connecticut; Georgia (20 county Atlanta area); Maryland (6 county Baltimore area); Minnesota; New Mexico; New York (15 county Rochester and Albany areas); Oregon (3 county Portland area); Tennessee (20 urban counties).ABCs Population: The surveillance areas r
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Public Domain
National Center for Immunization and Respiratory Diseases (U.S.) (2026). Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Group A Streptococcus, 2024.
National Center for Immunization and Respiratory Diseases (U.S.) "Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Group A Streptococcus, 2024" (2026)
National Center for Immunization and Respiratory Diseases (U.S.) "Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Group A Streptococcus, 2024" , 2026
National Center for Immunization and Respiratory Diseases (U.S.)
2026/04/21
ABCs Areas: California (3 county San Francisco Bay area); Colorado (5 county Denver area); Connecticut; Georgia (20 county Atlanta area); Maryland (6 county Baltimore area); Minnesota; New Mexico; New York (15 county Rochester and Albany areas and children <5 years in 33 additional counties, including Erie); Oregon (3 county Portland area); Tennessee (20 counties).ABCs Population: The surveillance areas represent 35,770,797 persons.Source: Census Bureau's Vintage 2024 population estimates.ABCs Case Definition: Disease is defined as isolation of S. pneumoniae from a normally sterile site or detection of pathogen-specific nucleic acid in a specimen obtained from a normally sterile body site, using a validated molecular test in a resident of one of the surveillance areas.Citation: Centers for Disease Control and Prevention. 2024. Active Bacterial Core Surveillance Report, EmergingInfections Program Network, Streptococcus pneumoniae, 2024. www.cdc.gov/abcs/downloads/SPN_Surveillance_Report_2024.pdf
Public Domain
National Center for Immunization and Respiratory Diseases (U.S.) (2026). Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Streptococcus pneumoniae, 2024.
National Center for Immunization and Respiratory Diseases (U.S.) "Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Streptococcus pneumoniae, 2024" (2026)
National Center for Immunization and Respiratory Diseases (U.S.) "Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Streptococcus pneumoniae, 2024" , 2026
National Center for Immunization and Respiratory Diseases (U.S.)
2026/04/21
ABCs Areas: California (3 county San Francisco Bay area); Colorado (5 county Denver area); Connecticut; Georgia; Maryland; Minnesota; New Mexico; NewYork (15 county Rochester and Albany areas); Oregon; Tennessee (20 urban counties)ABCs Population: The surveillance areas represent 46,473,142 persons.Source: Census Bureau's Vintage 2024 population es
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Public Domain
National Center for Immunization and Respiratory Diseases (U.S.) (2026). Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Haemophilus influenzae, 2024.
National Center for Immunization and Respiratory Diseases (U.S.) "Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Haemophilus influenzae, 2024" (2026)
National Center for Immunization and Respiratory Diseases (U.S.) "Active Bacterial Core Surveillance (ABCs) Report Emerging Infections Program Network: Haemophilus influenzae, 2024" , 2026
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (U.S.). Division of HIV/AIDS Prevention
2026/03/16
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HIV Surveillance Report
The release presents nationally representative data on behavioral and clinical characteristics of U.S. adults with diagnosed HIV from the 2023 cycle of the Medical Monitoring Project, which informs prevention, treatment goals, and resource planning to improve health outcomes and reduce transmission risk.
Supporting Files
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (U.S.). Division of HIV/AIDS Prevention (2026). Behavioral and Clinical Characteristics of Persons with Diagnosed HIV Infection: Medical Monitoring Project, United States, 2023 Cycle: June 2023–May 2024): Tables. 2023
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (U.S.). Division of HIV/AIDS Prevention "Behavioral and Clinical Characteristics of Persons with Diagnosed HIV Infection: Medical Monitoring Project, United States, 2023 Cycle: June 2023–May 2024): Tables" 2023 (2026)
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (U.S.). Division of HIV/AIDS Prevention "Behavioral and Clinical Characteristics of Persons with Diagnosed HIV Infection: Medical Monitoring Project, United States, 2023 Cycle: June 2023–May 2024): Tables" vol. 2023, 2026
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