Data collected from 18 states between March and August suggest the Pfizer-BioNTech vaccine reduces the risk of being hospitalized with COVID-19 by 91% in the first four months after receiving the second dose. Beyond 120 days, however, that vaccine efficacy drops to 77%. Meanwhile, Moderna’s vaccine was 93% effective at reducing the short-term risk of …
Continue reading “Not all vaccines are equal; study says some fade”
