FDA-authorized COVID-19 vaccines are effective per real-world evidence synthesized across a multi-state health system

The preliminary results of a US retrospective analysis, not yet peer reviewed, estimated administration of two doses of Covid-19 vaccine (Pfizer or Moderna) was 88.7% (95% CI 68.4-97.1%) effective in preventing Covid-19 infection with onset at least 36 days after the first dose.

Source:

MedRxiv