Should I worry about the side effects of the Covid-19 vaccine?

Of these people waiting in line to receive the Covid-19 vaccine in Los Angeles, United States, some may have stronger reactions to the vaccine than others, depending on their body’s immune response. — TNS

For some people, the second dose in a Covid-19 vaccination series is causing a stronger reaction and more side effects than the initial dose.

That was also true during the clinical trials.