Why do people afraid of being vaccinated?

Every time I think about getting the Covid-19 vaccine, my Facebook news feed will show me reports on this or that vaccine causing side effects, or even deaths. This makes me scared. What exactly is the truth?

All vaccines have side effects. Most of them are mild and will only cause you minor discomfort, if any at all.

Contrast this with getting the actual disease itself, such as Covid-19, measles, mumps, chickenpox, rubella or tuberculosis.