Covid-19: lack of diversity threatens to undermine vaccine trials, experts warn

Oxford and Moderna trials draw from strikingly white cohort, for a virus that has disproportionately affected people of colour

The remarkably fast progress of two leading contenders for an effective coronavirus vaccine has raised hopes the pandemic may be speedily tamed. But some experts have warned the vaccine trials risk being undermined by a lack of diversity among their participants.

Related: Coronavirus vaccine tracker: how close are we to a vaccine?