So far, millions of people have been given a COVID-19 vaccine and reports of serious side effects, such as allergic reactions or clotting problems, have been very rare.
The MHRA is currently carrying out a detailed review of reports of an extremely rare blood clotting problem affecting a small number of people who have had the Oxford/AstraZeneca vaccine.
The problem can also happen in people who have not been vaccinated, however, and it’s not yet clear why it affects some people.
What’s more, the risks posed by not getting vaccinated far outweigh the risks of experiencing rare events following vaccination.