before vaccination or before their immune system has had enough time to develop protection.
That timing can create the impression that the vaccine caused the illness.
For example, imagine someone is exposed to COVID-19 on Monday.
They receive a vaccine on Tuesday.
By Thursday, they develop symptoms.
The timing can understandably raise questions.
But the infection may already have been developing before vaccination.
Vaccination cannot instantly eliminate an infection that has already begun.
What About Feeling Sick After the Vaccine?
There is another meaning behind the phrase “vaccinated people may
