Nature CommunicationsBNT162b2 LP.8.1 early vaccine effectiveness against COVID-19 emergency department, urgent care, and outpatient visitsHaley J. AppanealVrishali V. LopesJennifer L. NguyenHannah R. VolkmanEvan J. ZasowskiAisling R. Caffrey2026-05-28Full textDOI https://doi.org/10.1038/s41467-026-73798-3