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I got my first pfizer shot, ended up having cold chilly fevers afterwards
I got the second pfizer shot, felt cold chilly fevers, then felt fine, then feverish again
What does this mean?
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https://www.nature.com/articles/d41586-021-01359-3
Mix-and-match COVID vaccines trigger potent immune response
Preliminary results from a trial of more than 600 people are the first to show the benefits of combining different vaccines.