Associated Emergency Department and Urgent Care Encounters and Hospitalizations Among Adults During Periods of Delta and Omicron Variant Predominance — VISION Network, 10 States, August 2021–January 2022 By Jill M. Ferdinands, PhD, et al. Summary What is already known...
Waning 2-Dose and 3-Dose Effectiveness of mRNA Vaccines Against COVID-19
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