Original site: www.cdc.gov/rsv/php/surveillance/index.html | RestoredCDC.org is an independent project, not affiliated with CDC or any federal entity. Visit CDC.gov for free official information. Due to archival on January 6, 2025, recent outbreak data is unavailable. Videos are not restored. Access data.restoredcdc.org for restored data. Use of this site implies acceptance of this disclaimer.

[More]
About Us Report Bug

RestoredCDC.org Comparison

Comparison timestamp: 2025-05-03 16:16:33 UTC
RestoredCDC URL: http://restoredcdc.org/www.cdc.gov/rsv/php/surveillance/index.html
Live cdc.gov URL ↗: https://www.cdc.gov/rsv/php/surveillance/index.html
Removed: Line removed from cdc.gov. Specific word removals are highlighted.
Added: Line added to cdc.gov. Specific word additions are highlighted.
Injected: Line or disclaimer added by RestoredCDC.org.
Unchanged: Line unchanged.
Original site: www.cdc.gov/rsv/php/surveillance/index.html | RestoredCDC.org is an independent project, not affiliated with CDC or any federal entity. Visit CDC.gov for free official information. Due to archival on January 6, 2025, recent outbreak data is unavailable. Videos are not restored. Access data.restoredcdc.org for restored data. Use of this site implies acceptance of this disclaimer.
[More]
About Us Report Bug Compare Content
Skip directly to site content Skip directly to search Skip directly to On This Page
An official website of the United States government
Here's how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
Respiratory Syncytial Virus Infection (RSV)
Explore Topics
Search
Search
Clear Input
For Everyone
* About
* How It Spreads
* Vaccines
* Symptoms
* RSV in Infants and Young Children
* RSV in Older Adults
* View all
Health Care Providers
* Clinical Guidance
* Vaccine Guidance
* View all
Public Health
* Surveillance
* RSV in Alaska Native Infants
* References and Resources
* View all
Related Topics:
Respiratory Virus Guidance
View All
search close search
search
RSV Menu Close
RSV Menu
search
For Everyone
* About
* How It Spreads
* Vaccines
* Symptoms
* RSV in Infants and Young Children
* RSV in Older Adults
* View All Home
Health Care Providers
* Clinical Guidance
* Vaccine Guidance
* View All
Public Health
* Surveillance
* RSV in Alaska Native Infants
* References and Resources
* View All
Related Topics
* Respiratory Virus Guidance
View All RSV
Surveillance RSV in Alaska Native Infants References and Resources View All
August 30, 2024
Español
Surveillance of RSV
What to know
* CDC maintains multiple systems to monitor respiratory diseases, including RSV, across the United States.
* RSV season typically begins in the fall, peaks in the winter, and ends in the spring in most of the United States.
Surveillance and research systems
CDC has several systems that focus on monitoring and describing seasonal trends, clinical risk factors, rates of illness and hospitalization, and demographics of patients seeking care for illness associated with respiratory syncytial virus (RSV).
* The National Respiratory and Enteric Virus Surveillance System (NREVSS) is a laboratory-based system that monitors seasons and circulation patterns of RSV and other viruses.
* The National Syndromic Surveillance Program (NSSP) is a collaboration among CDC, federal partners, state and local health departments, and academic and private sector partners to collect, analyze, and share electronic data received from emergency departments and other health care settings.
* The RSV Hospitalization Surveillance Network (RSV-NET) is a population-based surveillance system for RSV-associated hospitalizations in the U.S. among children and adults.
* The New Vaccine Surveillance Network (NVSN) is a multisite, active, population-based pediatric surveillance network for acute respiratory hospitalizations and outpatient visits associated with RSV and other respiratory pathogens.
* The Investigating Respiratory Viruses in the Acutely Ill (IVY) Network is a multisite, active surveillance network designed to assess how well vaccines work to prevent COVID-19, flu, and RSV-associated hospitalizations among adults.
* The RSV Surveillance in Native American Persons (RSV SuNA) collaboration monitors for RSV-associated hospitalizations and outpatient visits among Alaska Native and American Indian persons and is conducted on the Navajo Nation, White Mountain Apache Tribal Lands, and in Alaska. Additional information about other research and surveillance activities among Alaska Native persons may be provided by the Arctic Investigations Program.
RSV burden estimates
Each year in the United States, RSV leads to approximately:
* 2.1 million outpatient (non-hospitalization) visits among children younger than 5 years old.
* 58,000–80,000 hospitalizations among children younger than 5 years old.
* 100,000–150,000 hospitalizations among adults 60 years and older.
RSV seasonal trends
How are data collected?
CDC collects RSV laboratory test results performed in the United States using the National Respiratory and Enteric Virus Surveillance System (NREVSS). CDC analyzes data on RSV activity at the national, regional, and state levels. NREVSS is a voluntary, laboratory-based surveillance system established in the 1980s to monitor seasonal trends of several viruses, including RSV. Through NREVSS, participating laboratories report the total number of weekly RSV tests performed to detect the virus and the number of those tests that were positive. Data from NREVSS provide information to public health officials and healthcare providers about the presence of RSV in their communities.
What are the typical seasonal patterns?
In most regions of the United States and other areas with similar climates, the RSV season typically starts during the fall and peaks in the winter. Based on data from before the COVID-19 pandemic (2014 to 2017), in all 10 U.S. Department of Health and Human Services (HHS) regions, except Florida and Hawaii, these patterns were observed:
* RSV season onset (indicated by a sustained increase in the percent positivity of RSV tests above a threshold) ranged from mid-September to mid-November.
* RSV season peak (indicated by the maximum in percent positivity of RSV tests) ranged from late December to mid-February.
* RSV season offset (indicated by a sustained decrease in the percent positivity of RSV tests below a threshold) ranged from mid-April to mid-May.
Florida has an earlier RSV season onset and longer duration than most regions of the country.
On This Page
* Surveillance and research systems
* RSV burden estimates
* RSV seasonal trends
Related PagesRSV-NET
Related Pages
*
 
* RSV-NET
* Preliminary Estimates of RSV Burden for 2024-2025
* How CDC Estimates the Burden of RSV in the US
*
* RSV in Alaska Native Infants
* References and Resources
*
View All RSV
 
RSV-NET
Back to Top
August 30, 2024
Sources Print Share
Facebook LinkedIn Twitter Syndicate
Content Source:
National Center for Immunization and Respiratory Diseases; Coronavirus and Other Respiratory Viruses Division
Related PagesRSV-NET
Related Pages
*
 
* RSV-NET
* Preliminary Estimates of RSV Burden for 2024-2025
* How CDC Estimates the Burden of RSV in the US
*
* RSV in Alaska Native Infants
* References and Resources
*
View All RSV
Back to Top
RSV
Respiratory syncytial virus (RSV) usually causes mild, cold-like symptoms in most people, but it is the leading cause of infant hospitalization in the U.S.
View All
For Everyone
* About
* How It Spreads
* Vaccines
* Symptoms
* RSV in Infants and Young Children
* RSV in Older Adults
Health Care Providers
* Clinical Guidance
* Vaccine Guidance
Public Health
* Surveillance
* RSV in Alaska Native Infants
* References and Resources
Sign up for Email Updates
Contact Us
Contact Us
* Call 800-232-4636
* Contact CDC
About CDC
About CDC
* Pressroom
* Organization
* Budget & Funding
* Careers & Jobs
Policies
* Accessibility
* External Links
* Privacy
* Web Policies
* FOIA
* OIG
* No Fear Act
* Nondiscrimination
* Vulnerability Disclosure Policy
Languages
Languages
* Español
Language Assistance
* Español
* 繁體中文
* Tiếng Việt
* 한국어
* Tagalog
* Русский
* العربية
* Kreyòl Ayisyen
* Français
* Polski
* Português
* Italiano
* Deutsch
* 日本語
* فارسی
* English
Archive
* CDC Archive
* Public Health Publications
Contact Us
Contact Us
* Call 800-232-4636
* Contact CDC
About CDC
* Pressroom
* Organization
* Budget & Funding
* Careers & Jobs
* About CDC
Policies
* Accessibility
* External Links
* Privacy
* Web Policies
* FOIA
* OIG
* No Fear Act
* Nondiscrimination
* Vulnerability Disclosure Policy
Languages
Languages
* Español
Language Assistance
* Español
* 繁體中文
* Tiếng Việt
* 한국어
* Tagalog
* Русский
* العربية
* Kreyòl Ayisyen
* Français
* Polski
* Português
* Italiano
* Deutsch
* 日本語
* فارسی
* English
Archive
* CDC Archive
* Public Health Publications
HHS.gov USA.gov
Note: Comparison ignores leading/trailing whitespace and certain script/tracking codes. Word-level highlighting (optional above) only applies to changed lines.