Like all medicines, vaccines can cause side effects. Most are mild and short-term, and not everyone gets them.
Very common side effects include:
● pain and tenderness in the arm where you had your injection, which tends to be worst after 1-2 days
● feeling tired
● general aches, or mild, flu-like symptoms
Symptoms usually only last 2-3 days and normally less than a week. Resting and taking painkillers, such as paracetamol should help you feel better.
Don't let side effects put you off having the second dose, as you need that to get the best protection.
Although feeling feverish is not uncommon for two to three days, a high temperature for longer than a couple of days is unusual and may indicate you have Covid or another infection. If your symptoms don’t get better, or seem to get worse, or if you are concerned, seek advice by calling NHS 111.
Will it give me Covid?
You can’t catch Covid from the vaccine. It may take a few weeks for your body to build up protection against the virus, but it will reduce your chances of becoming seriously ill. You need to have both doses for maximum protection.
Should I be worried about blood clots?
For the vast majority of people, the benefits of the vaccine in providing protection against the serious consequences of Covid far outweigh any risks.
There have been reports of an extremely rare adverse event involving blood clots with low levels of platelets after vaccination with the AstraZeneca vaccine. Similar conditions can occur naturally, and clotting problems are also a common complication of Covid infection. As a precaution, people whose risk is greater, albeit still extremely small, will only be offered appointments for other vaccines.
Has it been tested?
The approved vaccines have met strict standards of safety and quality. They have been tested on tens of thousands of volunteers in multiple clinical trials and given to millions of people. Reports of serious side effects have been extremely rare, but some vaccines may be recommended for people under 40.