Why Are Moderna And Pfizer COVID-19 Vaccine Side Effects Worse After The Second Shot?

Why are Moderna and Pfizer COVID-19 vaccine side effects worse after the second shot?

How long after the Moderna COVID-19 vaccine could a skin reaction start appearing?

What is the main ingredient in an mRNA coronavirus vaccine?

mRNA – Also known as messenger ribonucleic acid, mRNA is the only active ingredient in the vaccine. The mRNA molecules contain the genetic material that provide instructions for our body on how to make a viral protein that triggers an immune response within our bodies.

What happens if you get COVID-19 between first and second shots?

It's possible to become infected with COVID-19 between the first and second shots of the Pfizer and Moderna vaccines — and immediately following the second shot of these vaccines. If you do catch COVID-19 between the two vaccine doses, you should make sure to get the second shot once you're feeling better.

What should I do if I get a rash from the COVID-19 vaccine?

Tell your vaccination provider that you experienced a rash or “COVID arm” after the first shot. Your vaccination provider may recommend that you get the second shot in the opposite arm.


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What is an immediate allergic reaction to the COVID-19 vaccine?

An immediate allergic reaction means a reaction within 4 hours of getting vaccinated, including symptoms such as hives, swelling, or wheezing (respiratory distress).


What are the delayed localized hypersensitivity reactions of the Moderna COVID-19 vaccine?

The delayed localized cutaneous reactions developed in a median (range) of 7 (2-12) days after receiving the Moderna COVID-19 vaccine. These reactions occurred at or near the injection site and were described as pruritic, painful, and edematous pink plaques.


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