The Pfizer/BioNTech and Moderna jabs have been linked to cases of mild heart inflammation - but the benefits still outweigh the risks, Sky News reports citing European and UK health agencies.

Myocarditis - inflammation of the heart muscle - and pericarditis - inflammation of the lining around the heart - have been observed in a small number of people who had the vaccines.

Both the European Medicines Agency (EMA) and the UK's Medicines and Healthcare products Regulatory Agency (MHRA) say that younger men were most likely to see the complication, especially after their second jab.

The EMA and MHRA are recommending that healthcare professionals and the public be on the lookout for symptoms of heart inflammation in people who have had the two vaccines.

This includes chest pain, shortness of breath, palpitations and an irregular heartbeat.

Anyone with these symptoms who has been vaccinated should seek "immediate medical attention", the MHRA said.