Skip directly to site content Skip directly to search


Español  Other Languages


Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting People
 Search

		Submit


The National Respiratory and Enteric Virus Surveillance System (NREVSS)


Section Navigation
			
			CDC Home








Norovirus National Trends						Print
													Updated February 15, 2024
																	Related Pages
										National U.S. map
Participating U.S. laboratories report the total number of norovirus tests performed that week, and the number of those tests that were positive to CDC weekly. Because reporting delays may be expected for some laboratories, data shown for the more recent weeks may be less complete than others. Each point on the trend graph below displays the average percent of tests that were positive from three adjacent weeks: the specified week, and the weeks preceding and following it. This is also known as a centered 3-week moving average.
In the United States, cases of norovirus occur most frequently during late fall, winter, and early spring. There may be variation in the timing of cases between regions and between communities in the same region.SVG: percent positive respiratory syncytial virus tests in the United States, by week
Table: percent positive norovirus tests in the United States, by week
							
					
							Last Reviewed:  February 15, 2024						Source: 	National Center for Immunization and Respiratory Diseases (NCIRD), Coronavirus and Other Respiratory Viruses Division
					Facebook
        Twitter
        LinkedIn
        Syndicate homeNREVSS Home
Coronavirus Surveillanceplus icon
National Trends
Census Region Trends
Surveillance Reports
About Common Human Coronaviruses
Human Metapneumovirus Surveillanceplus icon
National Trends
Census Region Trends
Human Metapneumovirus (HMPV) Surveillance Reports
About Human Metapneumovirus (HMPV)
Human Parainfluenza Virus Surveillanceplus icon
National Trends
Surveillance Reports
Clinical Features
Respiratory Adenovirus Surveillanceplus icon
National Trends
Clinical Features
Respiratory Syncytial Virus Surveillanceplus icon
National Trends
Census Region Trends
Census Division Trends
HHS Regional Trends
State Trends
Surveillance Reports
Clinical Features
Rotavirus Surveillanceplus icon
National Trends
Census Region Trends
Surveillance Reports
Clinical Features
Norovirus Surveillanceplus icon
National Trends
Census Region
Surveillance Reports
About Norovirus
Participating Labsplus icon
Map of Labs
List of Labs


About CDC
					Contact Us
					800-232-4636
 Facebook Twitter Instagram LinkedIn Youtube Pinterest Snapchat
 CONTACT CDC
				Contact Us
							Call 800-232-4636
							Email Us
			ABOUT CDC
				About CDC
							Jobs
							Funding
			POLICIES
				Accessibility
							External Links
							Privacy
							Policies
							No Fear Act
							FOIA
							OIG
							Nondiscrimination
							Vulnerability Disclosure Policy
			CONNECT WITH US
				Facebook
								Twitter
								Instagram
								LinkedIn
							Youtube
								Pinterest
								Snapchat
								Email
			LANGUAGES
				Español
							繁體中文
							Tiếng Việt
							한국어
							Tagalog
							Русский
							العربية
							Kreyòl Ayisyen
							Français
							Polski
							Português
							Italiano
							Deutsch
							日本語
							فارسی
							English


U.S. Department of Health & Human Services
			Accessibility
			External Links
			Privacy
			Policies
			No Fear Act
			FOIA
			Nondiscrimination
			OIG
			Vulnerability Disclosure Policy
			USA.gov


Exit Notification / Disclaimer Policy Close
 Links with this icon  indicate that you are leaving the CDC website. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
				Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.
				You will be subject to the destination website's privacy policy when you follow the link.
				CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website. Website Disclaimers
 Cancel Continue