COVID-19 vaccines are effective in preventing severe illness and
symptoms such as fever or coughs. Vaccination is expected to reduce the
number of severe COVID-19 patients and deaths.
The Pfizer—BioNTech COVID-19 vaccine has a efficacy of
95% in preventing severe COVID-19 or death by the
Alpha and Beta Variants.
As for the Delta variant, it is
88% effective against symptomatic disease and
96%
effective against hospitalization.
People 12 years of age and older. Certain limitations apply.
Some cases of side effects such as localized pain in the injected site (>50%), headache (>50%), fatigue (>50%), muscle and joint pain (10–50%), shivering (10–50%), diarrhea (10–50%), fever (10–50%), swelling at the injected site (10–50%), nausea and vomiting (1–10%) and anaphylaxis (acute allergic reaction) after vaccination in some rare cases have been reported.