![]() ![]() During October 2, 2016– May 20, 2017, clinical laboratories tested 865,168 specimens for influenza virus: 121,223 (14.0%) specimens tested positive for influenza virus ( Figure 1), including 84,854 (70.0%) that tested positive for influenza A viruses and 36,369 (30.0%) that tested positive for influenza B viruses. World Health Organization (WHO) Collaborating Laboratories and the National Respiratory and Enteric Virus Surveillance System. Early treatment with neuraminidase inhibitor antiviral medications is recommended for patients with severe, complicated, or progressive influenza illness and those at higher risk for influenza complications, including adults aged ≥65 years.ĬDC receives influenza test results from public health and clinical laboratories located in all 50 states, Puerto Rico, and the District of Columbia through U.S. ![]() Antiviral medications are an important adjunct to vaccination in the treatment and prevention of influenza. What are the implications for public health practice?Īnnual influenza vaccination is recommended for all persons aged ≥6 months and remains the most effective way to prevent influenza illness. The composition of the 2017–18 influenza vaccine has been updated to better match circulating influenza viruses. Data collected from Novemto April 14, 2017, indicate that influenza vaccination this season reduced the overall risk for influenza-associated medical visits by 42% (95% CI = 35%–48%). During October 2, 2016–May 20, 2017, influenza A(H3N2) viruses were identified most frequently, but influenza A(H1N1)pdm09 and influenza B viruses were also reported. Timing of influenza activity and predominant circulating influenza viruses vary by season.ĭuring the 2016–17 influenza season, influenza activity remained low through November 2016, increased during December, and peaked in February. CDC collects, compiles, and analyzes data on influenza activity year round in the United States. ![]()
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