Indoor environment have more air quality hazards than just Covid-19 particles themselves. According to the WHO, air pollution is the world’s greatest environmental health threat. Many people have always believed that ozone in the air is a double-edged sword . It has the side of sterilizing and inactivating viruses, but also has the side of endangering human health.
Modern research suggests that ozone in indoor air is now one of the most significant pollutants to human health.