During this pandemic time of COVID 19 all are curious about viruses, but not all information can be trusted unless they are well researched.
The survival time of viruses in water varies extensively and is reliant on the specific
· temperature, and
· general quality of the water.
As per Cookson 1974 Under certain circumstances and with certain virus types, survival times may be up to 200 days in river water
The other important factor is contact time.
most resistant, virus need 40 minutes and least resistant virus need 2.5 minutes contact time.