Has there been any serious adverse events as a result of taking the Pfizer-BioNTech COVID-19 Vaccine?

Has there been any serious adverse events as a result of taking the Pfizer-BioNTech COVID-19 Vaccine?

Serious adverse events, while uncommon (<1.0%), were observed at slightly higher numerical rates in the vaccine study group compared to the saline placebo study group, both overall and for certain specific adverse events occurring in very small numbers. Feb 16, 2022