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.
Are mRNA COVID-19 vaccines safe?
Is there a live virus in the mRNA COVID-19 vaccines?
The mRNA vaccines do not contain any live virus. Instead, they work by teaching our cells to make a harmless piece of a “spike protein,” which is found on the surface of the virus that causes COVID-19. After making the protein piece, cells display it on their surface.
Related Question What are the common side effects of the Pfizer-BioNTech COVID-19 vaccine?
Can COVID-19 cause blood clots and blood vessel problems to the heart?
COVID-19 can make blood cells more likely to clump up and form clots. While large clots can cause heart attacks and strokes, much of the heart damage caused by COVID-19 is believed to stem from very small clots that block tiny blood vessels (capillaries) in the heart muscle.