The antibody drug Ronapreve is being reviewed by Medsafe to treat covid-19 patients in New Zealand. Described as an antibody cocktail, the World Health Organisation is recommending people who are most at risk of being hospitalised, and those with severe or critical Covid-19, who lack their own antibody response be treated with Ronapreve. It's already been cleared for use in the UK. Also known as Regeneron, it was previously used by former US president Donald Trump. Kathryn Ryan speaks with Infectious Diseases Physician and Professor of Biochemistry at the University of Otago, Professor Kurt Krause, who says these antibodies should be given early in the course of Covid to be most effective.