I watched the latest video by Out of the Doldrums. Scientists created a device to mimic coughing and sneezing. They found that the Covid-19 virus can stay airborne for 3 hours after coughing or sneezing.
The scientists then examined how long the virus can stay viable on surfaces. The virus can survive for 24 hours on cardboard, and 2-3 days on plastic or stainless steel. Thank you Dr. Van Dyken for making this video.