Major trials will begin this weekend of an antibody cocktail that scientists hope will protect people against Covid-19 and could be swiftly used in care homes or on cruise ships in the event of an outbreak.
A UK volunteer will be given the first dose of a drug that is expected to give vulnerable people immediate protection. The jab into the muscle of the arm takes effect straight away and could last for six months to a year. If it works as well as scientists predict, it could be used to protect those who cannot be given vaccines because of their state of health.