Campbell AP, Ogokeh C, Weinberg GA, Boom JA, Englund JA, Williams JV, Halasa NB, Selvarangan R, Staat MA, Klein EJ, McNeal M, Michaels MG, Sahni LC, Stewart LS, Szilagyi PG, Harrison CJ, Lively JY, Rha B, Patel M. Effect of Vaccination on Preventing Influenza-Associated Hospitalizations Among Children During a Severe Season Associated With B/Victoria Viruses, 2019-2020. Clin Infect Dis. 2021 08 16; 73(4):e947-e954.