Why do some people get side effects after COVID vaccines? - New York Post

Why do some people get side effects after COVID-19 vaccines.

Temporary side effects including headache, fatigue and fever are signs the immune system is revving up — a normal response to vaccines.

“The day after getting these vaccines, I wouldn’t plan anything that was strenuous physical activity,” said Dr.

White blood cells swarm to the site, prompting inflammation that’s responsible for chills, soreness, fatigue and other side effects.

This rapid-response step of your immune system tends to wane with age, one reason younger people report side effects more often than older adults.

A tiny percentage of people who got vaccines made by AstraZeneca and Johnson & Johnson reported an unusual type of blood clot.

That’s why you’re asked to stick around for about 15 minutes after getting any type of COVID-19 vaccine — to ensure any reaction can be promptly treated