Europe's drugs regulator has said it is looking into three new conditions to assess any possible side-effects related to Covid-19 vaccines from Pfizer and Moderna following a small number of cases, Reuters reports.

Erythema multiforme, a form of allergic skin reaction, and glomerulonephritis and nephrotic syndrome, disorders related to kidneys, are being studied by the safety committee of the European Medicines Agency (EMA), according to the regulator.

The mRNA technology used by the two vaccines has been a turning point in the pandemic and for the scientific community, with their high effectiveness against Covid-19, but some rare side-effects of the shots are being studied as more people are inoculated globally.