Don’t pin your hopes on plasma curing Covid ... yet, says WHO

World

Don’t pin your hopes on plasma curing Covid ... yet, says WHO

Some studies have shown the treatment is effective, but the WHO says these are few and safety is a concern

Anne Gulland

Evidence that convalescent plasma is effective in treating patients with coronavirus is “low quality”, the World Health Organisation (WHO) said as the US issued emergency approval for the use of the therapy.

On Sunday, the US Food and Drug Administration (FDA) granted authorisation for the technique, but Dr Soumya Swaminathan, the WHO’s chief scientist, said only a few clinical trials of convalescent plasma have produced results.

“At the moment, it’s still very low-quality evidence, so we recommend that convalescent plasma is still an experimental therapy. It should continue to be evaluated in well-designed randomised clinical trials,” she said...

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