The World Health Organization has said it will study fresh evidence on airborne transmission of the coronavirus, after an international group of scientists concluded it could spread far beyond two metres.
The WHO said it would put out a new scientific brief within days, rounding up the knowledge about how the virus can be transmitted and ensuring its guidance stays in line with the evidence.
The two-metre physical distancing guideline has been a major factor in the fight against the Covid-19 pandemic, which has killed more than 538,000 people and infected over 11.6 million since the outbreak emerged in China last December.