What if I feel ill a few days later?

You may have a headache, feel hot or have aches in your arms and legs or feel tired. This might last for two or three days after the injection. It shows the vaccine is working and the body is fighting back and making the antibodies it needs. More serious side effects are very rare.

If the redness or pain where you got the vaccine gets worse after one day or if your side effects really worry you or do not seem to be going away after a few days you should call 111 or if you think it is an emergency call 999.