In the absence of effective treatment or biomedical prevention, efforts to control the
coronavirus disease 2019 (COVID-19) pandemic have relied on nonpharmaceutical
interventions such as personal preventive actions (eg, handwashing, face covers),
environmental cleaning, physical distancing, stay-at-home orders, school and venue
closures, and workplace restrictions adopted at the national, state, and local levels. In
addition to these public health interventions, development of herd immunity could also …