Covid-19 vaccination

Safety and effectiveness

How safe are the Covid-19 vaccines?

Any coronavirus vaccine that is approved must go through all the clinical trials and safety checks all other licensed medicines go through. The Medicines and Healthcare products Regulatory Agency (MHRA) follows international standards of safety.

At present, two vaccines have been approved for use in the UK. These vaccines have been developed by:

Other vaccines are being developed. They will only be available on the NHS once they have been thoroughly tested to make sure they are safe and effective.

Read more about the safety procedures and approval processes the vaccines will need to complete before being made available on the MHRA website.

How effective is the Covid-19 vaccine?

After having both doses of the Covid-19 vaccine most people will be protected against coronavirus. It takes a few weeks after getting the 2nd dose for it to work.

The vaccine has been shown to be effective and no safety concerns were seen in studies of more than 20,000 people.

There is a small chance you might still get coronavirus even if you have the vaccine, which is why it is important to remember to:

  • continue to follow social distancing guidance
  • Wear a face covering (unless you are exempt)

Read more about why vaccines are important.