※1、Because specific virus names cannot be shown for reasons related to the Pharmaceutical and Medical Devices Act (Act on Securing Quality, Efficacy and Safety of Products including Pharmaceutical and Medical Devices), the virus is shown as Virus A, Virus B and Virus C
※2、Membranous structure found in virus particles, it is said that if there is no envelop, resistance to disinfectants such as alcohol is stronger than having an envelope.
※3、PFU (Plaque-Forming Unit) An index of the number of viruses measured from the number of plaques.











