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 COVID-19 hospitalization and remained 92% effective after 120 days.
LA Times
Big gap between Pfizer, Moderna vaccines seen for preventing COVID hospitalizations
America’s workhorse shot, the Pfizer vaccine, is significantly less effective at preventing severe cases of disease over the long term than many experts had realized.
Your “vaccine passport” may have an expiry date.