As the weather gets colder and people head indoors, the risk of catching Covid-19 is rising. WSJ explains why air ventilation and filtration are one of our biggest defenses against the coronavirus this winter.
Illustration: Nick Collingwood/WSJ
As the weather gets colder and people head indoors, the risk of catching Covid-19 is rising. WSJ explains why air ventilation and filtration are one of our biggest defenses against the coronavirus this winter.
Illustration: Nick Collingwood/WSJ