[HTML][HTML] Interim estimates of 2017–18 seasonal influenza vaccine effectiveness—United States, February 2018

B Flannery - MMWR. Morbidity and mortality weekly report, 2018 - cdc.gov
B Flannery
MMWR. Morbidity and mortality weekly report, 2018cdc.gov
So far this season, influenza A (H3N2) viruses have predominated, but other influenza
viruses are also circulating. Based on data from 4,562 children and adults with acute
respiratory illness enrolled during November 2, 2017–February 3, 2018, at five study sites
with outpatient medical facilities in the United States, the overall estimated effectiveness of
the 2017–18 seasonal influenza vaccine for preventing medically attended, laboratory-
confirmed influenza virus infection was 36%.
So far this season, influenza A (H3N2) viruses have predominated, but other influenza viruses are also circulating. Based on data from 4,562 children and adults with acute respiratory illness enrolled during November 2, 2017–February 3, 2018, at five study sites with outpatient medical facilities in the United States, the overall estimated effectiveness of the 2017–18 seasonal influenza vaccine for preventing medically attended, laboratory-confirmed influenza virus infection was 36%.
cdc.gov