Information provided by the PA Department of Health and the Centers for Disease Control
Currently, two vaccines are authorized and recommended to prevent COVID-19:
Pfizer-BioNTech COVID-19 vaccine
- Recommended for people aged 16 years and older.
- 2 shots given 21 days apart.
- Based on evidence from clinical trials, the Pfizer-BioNTech vaccine was 95% effective at preventing laboratory-confirmed COVID-19 illness in people without evidence of previous infection.
Moderna's COVID-19 vaccine
- Recommended for people aged 18 years and older.
- 2 shots given 28 days apart.
- Based on evidence from clinical trials, the Moderna vaccine was 94.1% effective at preventing laboratory-confirmed COVID-19 illness in people who received two doses who had no evidence of being previously infected.
Vaccines in Phase 3 Clinical Trials
Phase 3 clinical trials are in progress or being planned for three additional COVID-19 vaccines in the United States:
- AstraZeneca's COVID-19 vaccine
- Janssen's COVID-19 vaccine
- Novavax's COVID-19 vaccine