According to the CDC and EPA, a virus can be physically removed by proper cleaning or de-activated with disinfectants, but if they are claiming to use a magic serum to kill viruses, this could be a red flag. Or, even worse, they could be mixing chemicals together, which could lead to the release of chemicals much more deadly than the virus they are suppose to be treating.
If the company tells you the name of the chemical or disinfectant they are utlizing for virus decontamination, ask them to send you the safety data sheet (SDS). They should be able to send this to you, and the disinfectant should be on the EPA list N, which is the approved list of disinfectants for products that meet EPA’s criteria for use against SARS-CoV-2. The SDS will also explain the potential hazards and health effects of the chemical. If you do not understand the SDS, we highly recommend you seek the opinion of someone qualified to explain it prior to use.