Alcohol Rub Sanitizers kill most Bacteria, and fungi and stop some viruses. Alcohol rub sanitizers containing at least 70% alcohol (mainly ethyl alcohol) kill 99.9% of the bacteria on hands 30 seconds after application and 99.99% and 99.999% in one minute.
Sanitizers can be used frequently. There is no harm associated with frequent application. It has to be used multiple times when in contact with virus prone situation as in the case of coronavirus.
Isopropyl Alcohol: 70%