Chung JR, Kim SS, Kondor RJ, et al. Interim Estimates of 2021–22 Seasonal Influenza Vaccine Effectiveness — United States, February 2022. MMWR Morb Mortal Wkly Rep 2022;71:365–370.
https://www.cdc.gov/mmwr/volumes/71/wr/mm7110a1.htm?s_cid=mm7110a1_w
“Overall, vaccine effectiveness (VE) against medically attended outpatient ARI associated with influenza A(H3N2) virus was 16% (95% CI = −16% to 39%), which is considered not statistically significant.”