Category: Facemasks
USA: ABC reporter tests positive for Covid-19 after White House Correspondents’ Dinner *1 UPDATE*
In the least surprising news of 2022, ABC News’ Chief Washington Correspondent Jonathan Karl has tested positive for Covid-19 days after sitting next to Kim Kardashian at the White House Correspondents’ Dinner and interacting with President Joe Biden. More...
Research: Surgical masks only filter about 10% of aerosol droplets
A new Canadian study has shown that most common face masks, primarily due to problems with fit, filter about 10 per cent of exhaled aerosol droplets. More...
FFP2 masks more effective at preventing Covid infection than vaccines
Max Planck: “When both wear a surgical mask, while the infectious is speaking, the very conservative upper bound remains below 30% after 1h, but, when both wear a well-fitting FFP2 mask, it is 0.4%”
We find, for a typical SARS-CoV-2 viral load and infectious dose, that social distancing alone, even at 3m between two speaking individuals, leads to an upper bound of 90% for risk of infection after a few minutes. More...