Google News - COVID-19: Creating a coronavirus vaccine is just half the battle. To stop the pandemic, we then need to mass-produce and distribute it, and ensure people get it. - Australian researchers tested one, two and three layer masks and found two and three layers best for protection against Covid-19. Video is courtesy of the ... ( EnglishH 1447 p4t )

https://translate.google.com/#view=home&op=translate&sl=en&tl=vi&text=Creating+a+coronavirus+vaccine+is+just+half+the+battle.+To+stop+the+pandemic,+we+then+need+to+mass-produce+and+distribute+it,+and+ensure+people+get+it.+-+Australian+researchers+tested+one,+two+and+three+layer+masks+and+found+two+and+three+layers+best+for+protection+against+Covid-19.+Video+is+courtesy+of+the+...