Confronting the evolution and expansion of anti-vaccine activism in the USA in the COVID-19 era. Issue 10380 (18th March 2023) - Carpiano, Richard M; Callaghan, Timothy; DiResta, Renee; Brewer, Noel T; Clinton, Chelsea; Galvani, Alison P; Lakshmanan, Rekha; Parmet, Wendy E; Omer, Saad B; Buttenheim, Alison M; Benjamin, Regina M; Caplan, Arthur; et al.