People who have had Covid-19 are highly likely to have immunity to it for at least five months but there is evidence that those with antibodies may still be able to carry and spread the virus, a UK study of healthcare workers has found.

Preliminary findings by scientists at Public Health England (PHE) showed that reinfections in people who have Covid-19 antibodies from a past infection are rare - with only 44 cases found among 6,614 previously infected people in the study.