The length of time that viruses can survive outside the human body depends on conditions such as temperature and humidity, and viruses survive longer under the right conditions. Viruses are particularly susceptible to survival on water-resistant surfaces such as stainless steel and plastics, and can sometimes survive on indoor surfaces for several days, but their ability to cause infection declines gradually over time. Influenza viruses can survive in the air for several hours, especially at low temperatures, and they will remain viable and infectious on hard surfaces for up to 24 hours. For the new coronavirus of current interest, a report published in the Journal of Hospital Infection in February of this year analyzed dozens of previously published papers on human coronaviruses and showed that coronaviruses can remain on metal, glass or plastic surfaces for up to 9 days, while the new coronavirus can survive for 4 hours in air at 10-15 degrees Celsius, and it can only survive for 2-30 minutes at 25 degrees Celsius. minutes.