How could artificial antibodies fight coronavirus?

A new treatment that uses laboratory-made antibodies is to be trialled on Covid-19 patients in UK hospitals.

These monoclonal antibodies will be given to about 2,000 people as part of the UK Recovery Trial, which previously found that a cheap steroid called dexamethasone could save lives.

Science Correspondent Rebecca Morelle explains how the antibodies work.

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Coronavirus: Monoclonal antibodies to begin UK trial