Hospital Grade Newgen Microbe Guard Surface Spray Disinfectant. Approved by the Therapeutic Goods Administration (TGA) Newgen Microbe Guard Surface Spray Disinfectant (ARTG: 338731) is a hospital grade broad-spectrum antimicrobial surface spray disinfectant with outstanding biocidal activity reduction. It is also listed on ARTG directory as one of the Australian Government approved disinfectants for use against COVID-19 virus. Unlike other surface disinfectant products, the Newgen Microbe Guard formula is non toxic, water based, alcohol free, safe to store and will not cause harm to hard surfaces or the environment.