What masks are best for Delta variant?

A former Food and Drug Administration commissioner has offered advice about the kind of masks that offer the most protection against the Delta variant of Covid-19.

Dr Scott Gottlieb told CBS’s Face The Nation on Sunday that despite the current prevalence of the Delta variant in the US, the “characteristics of the virus haven’t changed”.

“It’s not more airborne and it’s not more likely to be permeable to a mask,” Dr Gottlieb said.

“The first thing I would urge Americans to do is get vaccinated,” he told programme host John Dickerson.