Exclusive: no leading contender is effective against all the South African, Brazilian and Kent variants
The great hope for drug treatments against Covid-19 – the monoclonal antibodies – are failing against variants of the virus, such as those that have emerged in South Africa and Brazil, scientists have found.
There have been high expectations of the drugs. One, made by Regeneron in the United States, was given to Donald Trump and may have played a part in his recovery. It is being trialled in hospital patients in the UK.
