Scientists in Ontario have found that Pfizer-BioNTech, Moderna, and Astra-Zeneca vaccines are doing better than first expected.
Even a single dose of any of these three vaccines provide good to excellent protection against:
- symptomatic infection
- severe outcomes (hospitalization or death)
The scientists expect that two doses are likely to provide even higher protection.
Here is the news report from CP24 News: New Ontario study finds even one COVID-19 vaccine dose provides strong protection against variants and the Pre-print manuscript of the study.