United States influenza statistics by flu season

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H1N1 versus H5N1 pathology

United States Influenza Statistics by Flu Season

The United States experiences annual outbreaks of the influenza virus, commonly known as the flu. These outbreaks vary in severity and impact, affecting populations across the country. The Centers for Disease Control and Prevention (CDC) monitors and compiles data on influenza activity, including the number of cases, hospitalizations, and deaths. This article provides an overview of influenza statistics in the United States by flu season.

Overview

Influenza is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness and at times can lead to death. The best way to prevent flu is by getting vaccinated each year. The flu season in the United States typically runs from fall through winter, with peaks between December and February, but activity can last as late as May.

Statistics by Season

2019-2020 Flu Season

The 2019-2020 flu season was notable for the co-circulation of influenza A and B viruses. According to the CDC, an estimated 38 million people were ill with the flu, resulting in approximately 18 million medical visits, 400,000 hospitalizations, and 22,000 flu deaths.

2020-2021 Flu Season

The 2020-2021 flu season was unprecedented due to the COVID-19 pandemic. Public health measures to prevent the spread of COVID-19, such as mask-wearing, social distancing, and increased hand hygiene, contributed to a significant decrease in influenza activity. The CDC reported minimal flu activity, with a record low number of hospitalizations and deaths attributed to influenza.

2021-2022 Flu Season

The 2021-2022 flu season saw a return of influenza activity, though not to pre-pandemic levels. The CDC estimated that there were 9 million flu illnesses, 4 million medical visits, 140,000 hospitalizations, and 9,000 deaths due to the flu. Influenza A(H3N2) viruses were the most common.

Prevention and Control

Vaccination remains the most effective way to prevent the flu and its potentially serious complications. The CDC recommends annual flu vaccination for everyone 6 months of age and older. Other preventive measures include avoiding close contact with sick individuals, covering mouth and nose with a tissue when coughing or sneezing, washing hands frequently, and staying home when sick.

Conclusion

Influenza remains a significant public health challenge in the United States, with annual outbreaks affecting millions of Americans. Monitoring flu statistics by season helps public health officials and the general public understand the impact of the virus and the importance of preventive measures, including vaccination.