Scientists vouch for retracting study claiming Covid-19 spread is airborne

Scientists including Noah Haber from Stanford University in the US, said the PNAS study had methodological design flaws and made easily falsifiable claims

More than 40 scientists have signed an open letter calling for the retraction of a study which made "extraordinary claims" that airborne transmission could be the dominant mode of spread of Covid-19.

The study, which was published last week in the journal PNAS, compared Covid-19 case counts and measures enforced in China's Wuhan city, Italy, and New York City in the US, and noted that wearing of face masks in public corresponds to the most effective means to prevent the spread of Covid-19.

In the open letter, scientists including Noah Haber from Stanford University in the US, said the PNAS