Immune clue sparks coronavirus treatment hope

UK scientists are to begin testing a treatment that it is hoped could counter the effects of Covid-19 in the most seriously ill patients.

It has been found those with the most severe form of the disease have extremely low numbers of an immune cell called a T-cell.

T-cells clear infection from the body.

The clinical trial will evaluate if a drug called interleukin 7, known to boost T-cell numbers, can aid patients' recovery.