A coronavirus treatment already approved in the UK and US which uses blood from recovered patients can help the infected get better within three days.

Ten COVID-19 patients who were severely ill in the hospital saw their symptoms disappear or rapidly improve within 72 hours after the therapy.
They were given a dose of plasma donated from COVID-19 survivors, which had the antibodies necessary for their immune system to clear the virus.
Known as convalescent plasma therapy, it has recently been given the green light by medical regulators in the UK and US to trial on critically ill patients.

The promising therapy, which was first used a century ago in the 1918 Spanish flu pandemic, has been used already in China and the US.