Viruses frozen in water are likely to be inactivated by the water’s relatively low pH.
He adds that viruses are more likely to survive in a frozen state if they freeze and thaw only once, as the freeze-thaw process kills at least 90% of virus each time.
How long can flu virus survive?
“Flu viruses can survive on hard surfaces (like bus poles) and infect another person for 24 to 48 hours,” she says. “Cold viruses don’t survive as long—usually a few hours. But there is evidence that they can survive and be passed on for up to 24 hours.” RELATED: How Long Does It Take for the Flu Shot to Be Effective?
Why are viruses worse in winter?
There is a theory that the influenza virus may survive better in colder, drier climates. When it’s humid outside, water droplets in the air fall to the ground. This is because they’re heavier, right? When this happens, any viruses or germs surviving in those droplets also fall to the ground.
How long do viruses live on fabric?
For example, cold and flu viruses survive longer on inanimate surfaces that are nonporous, like metal, plastic and wood, and less on porous surfaces, like clothing, paper and tissue. Most flu viruses can live one to two days on nonporous surfaces, and 8 to 12 hours on porous surfaces.
Does freezing food kill viruses?
Bacteria survive rapid freezing; but freeze-thaw cycles usually kill them. Freezing cells in water damages them more than does freezing in liquid nitrogen (-80 deg C); the latter type of storage is a method for preserving them. Viruses are not alive, so cannot necessarily be killed.
Photo in the article by “Army.mil”