Wow. Now just imagine if everybody got vaccinated by the time delta hit and we wore masks inside crowded areas back then. Sad.
SARS-CoV-2 In-Class Transmission at a Large Urban University With Public Health Mandates
This cohort study using surveillance testing data from a university located in a large US city examines incidence of in-classroom SARS-CoV-2 transmission on a college campus with contact tracing and vaccination and masking requirements.
jamanetwork.com