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Respiratory Syncytial Virus (RSV) in Florida

Florida Health

Disease Control

Respiratory Syncytial Virus Surveillance

Activity Summary

Weeks 35-36 ( August 29 - September 11, 2021 )

Respiratory syncytial virus (RSV) is a common respiratory virus that usually causes mild, cold-like symptoms. Young children and older adults, especially those with certain underlying health conditions, are at higher risk for severe illness from RSV. Prophylaxis is available for children who qualify. For more information, contact your health care provider.


In weeks 35-36, RSV activity in children <5 years decreased. Levels were above those seen at this time in past years.

Currently, four of Florida’s five regions are in RSV season.

In weeks 35-36, the percent of emergency department and urgent care center visits for RSV among children <5 years increased. RSV activity in children <5 years was above levels observed at this time in previous years.

In weeks 35-36, RSV activity in children <5 years increased and was above levels observed at this time in previous seasons.

In weeks 35-36, the percent of specimens testing positive for rhinovirus increased and remained higher than other respiratory viruses under surveillance.

RSV Surveillance

Florida’s RSV season is longer than the rest of the nation and has distinct regional patterns. The RSV seasons shown here are based on activity thresholds provided by the Centers for Disease Control and Prevention. Currently, three of Florida's five regions are in RSV surveillance.

The determination of unique seasonal and geographic trends of RSV activity in Florida has important implications for prescribing patterns for initiating prophylaxis to children at high risk for complications from RSV infection. The American Academy of Pediatrics currently recommends pre-approval for prophylactic treatment be made based on state surveillance data.

To learn more about RSV in Florida, please visit FloridaHealth.gov/RSV.

Northwest Region, October- April: Escambia, Santa Rosa, Okaloosa, Bay, Washington, Holmes, Jackson, Calhoun, Gulf, Gadsden, Liberty, Franklin, Wakulla, Leon, Jefferson North Region, September-March (currently in season): Madison, Taylor, Hamilton, Suwannee, Lafayette, Dixie, Levy, Alachua, Gilchrist, Union, Bradford, Columbia, Barker, Nassau, Duval, Clay, St. Johns, Putnam Central Region, August-March (currently in season): Citrus, Marion, Flagler, Volusia, Lake, Sumter, Citrus, Hernando, Pasco, Pinellas, Hillsborough, Osceola, Brevard, Orange, Seminole Southwest Region, September-April (currently in season): Polk, Manatee, Hardee, Highlands, Okeechobee, Glades, Charlotte, Desoto, Sarasota, Lee, Hendry, Collier Southeast Region, January-December (currently in season): Indian River, St. Lucie, Martin, Palm Beach, Broward, Miami-Dade, Monroe

The Figure shows Florida’s RSV regional season breakdown. Regions that are currently in RSV season are marked with pink stars.

*Note: This page contains materials in the Portable Document Format (PDF). The free Acrobat Reader may be required to view these files.