Interim influenza vaccine effectiveness estimates for the 2016–17 season indicate that vaccination reduced the risk for influenza-associated medical visits by approximately half.
February 17th, 2017Flannery B, Chung JR, Thaker SN, et al. Interim Estimates of 2016–17 Seasonal Influenza Vaccine Effectiveness — United States, February 2017. MMWR Morb Mortal Wkly Rep 2017;66:167–171. DOI: http://dx.doi.org/10.15585/mmwr.mm6606a3.
“Influenza activity in the United States began to increase in mid-December, remained elevated through February 4, 2016, and is expected to continue for several more weeks. During October 2, 2016–February 4, 2017, influenza A (H3N2) viruses were identified most frequently, but influenza A (H1N1)pdm09 and influenza B viruses were also reported. No antiviral resistance to oseltamivir, zanamivir, or peramivir has been identified among influenza viruses tested to date.”