(23 Jun 2021)

It may appear on one part of the body or be spread across large areas. The rash is usually very itchy and ranges in size from a few millimetres to the size of a hand.

Others suffered from swelling or angioedema, which is the swelling of areas of tissue under the skin, sometimes affecting the face and throat.

The study looked at Pfizer and Moderna jabs, which have the same messenger RNA process.