CDC (MMWR) shockingly poor Vaccine Effectiveness: "Seasonal Influenza Vaccine Effectiveness, Interim Estimates of 2021–22 Seasonal Influenza Vaccine Effectiveness —United States, February 2022"

by Paul Alexander

Morbidity and Mortality Weekly Report, March 11, 2022; Influenza A/H3N2 reported as 16%, 95% CI ranging from -16% to 39%; this is negative effectiveness and not statistically significant

‘This interim estimate of 2021–22 influenza VE suggests that influenza vaccination did not significantly reduce the risk of outpatient medically attended illness with influenza A(H3N2) viruses that have predominated so far this season. These findings are consistent with previous evidence of low to no protection against outpatient infection with A(H3N2) subclade 2a.2 viruses from an investigation of an influenza outbreak on a university campus during October–November 2021’.