A major study recently discovered how long COVID-19 stays alive outside the human body.

COVID-19 was applied to the surfaces of air, copper, cardboard, stainless steel, and plastic at 21 to 23°C, 40% relative humidity, and over 7 days.

COVID-19 was found alive on the following surfaces for the following hours:

Airborne: 3 hours
Copper: 4 hours
Cardboard: 24 hours
Steel: 72 hours
Plastic: 72 hours