1) Aerosols (airborne transmission) mainly due to droplets released when an infected individual coughs or sneezes – up to three hours

2) Copper – up to four hours

3) Cardboard – up to 24 hours

4) Stainless steel – up to 72 hours (three days)

5) Plastic – up to 72 hours (three days)

Research, led by the National Institute of Allergy and Infectious Diseases, U.K.

Published in The New England Journal of Medicine

https://www.nejm.org/doi/full/10.1056/NEJMc2004973

Summary by The Spinal Foundation, India