The World Health Organisation is recommending a pricey antibody treatment for certain coronavirus patients in the latest update to its guidelines for treating people with COVID-19.

The new guidelines, published Friday in the journal BMJ, say the two antibodies - casirivimab and imdevimab - made by Regeneron should be given to people infected with COVID-19 who are at highest risk of hospitalization and to people whose own immune systems have not mounted a response.