Vaccines against SARS-CoV-2 will have side effects – that's a good thing
2020 Dec 03
A little bit of post-injection soreness is completely normal. Jose Luis Pelaez Inc/DigitalVision via Getty Images
The side effects of new SARS-CoV-2 vaccines are a result of immune system activation. While uncomfortable, they are both normal and expected. They are a sign that the vaccine is working.