There is no US FDA approved vaccine to prevent COVID 19.  The FDA has NOT APPROVED the injections created by Pfizer.  The Pfizer injections do not meet the FDA standard of approval

"If FDA grants an approval, it means the agency has determined that the benefits of the product outweigh the known risks for the intended use."

Pfizer says: "There is no U.S. Food and Drug Administration (FDA) approved vaccine to prevent COVID-19."

" ... the Pfizer-BioNTech COVID-19 Vaccine could cause a severe allergic reaction. A severe allergic reaction would usually occur within a few minutes to one hour after getting a dose of the Pfizer-BioNTech COVID-19 Vaccine. For this reason, your vaccination provider may ask you to stay at the place where you received your vaccine for monitoring after vaccination. Signs of a severe allergic reaction can include:
• Difficulty breathing
• Swelling of your face and throat
• A fast heartbeat
• A bad rash all over your body
• Dizziness and weakness

Myocarditis (inflammation of the heart muscle) and pericarditis (inflammation of the lining outside the heart) have occurred in some people who have received the Pfizer-BioNTech COVID-19 Vaccine. In most of these people, symptoms began within a few days following receipt of the second dose of the Pfizer-BioNTech COVID-19 Vaccine. The chance of having this occur is very low. You should seek medical attention right away if you have any of the following symptoms after receiving the Pfizer-BioNTech COVID-19 Vaccine:
• Chest pain
• Shortness of breath
• Feelings of having a fast-beating, fluttering, or pounding heart.

Side effects that have been reported with the Pfizer-BioNTech COVID-19 Vaccine
include:
• severe allergic reactions
• non-severe allergic reactions such as rash, itching, hives, or swelling of the face
• myocarditis (inflammation of the heart muscle)
• pericarditis (inflammation of the lining outside the heart)
• injection site pain
• tiredness
• headache
• muscle pain
• chills
• joint pain
• fever
• injection site swelling
• injection site redness
• nausea
• feeling unwell
• swollen lymph nodes (lymphadenopathy)
• diarrhea
• vomiting
• arm pain

These may not be all the possible side effects of the Pfizer-BioNTech COVID-19 Vaccine.

Serious and unexpected side effects may occur.

Pfizer-BioNTech COVID-19 Vaccine is still being studied in clinical trials."