INTRODUCTION The burden of chronic diseases is rapidly increasing worldwide. Chronic diseases are largely preventable diseases. Beyond the appropriate medical treatment for those already affected, the public health approach of primary prevention is considered to be the most cost-effective, affordable and sustainable course of action to cope with the chronic disease epidemic worldwide.In advanced countries like US, UK & Europe they are practicing many preventive methods. STERILIZATION & DISINFECTION Sterilization and Disinfection are both decontamination processes. Sterilization is the process ofkilling all microorganisms while Disinfection is the process of eliminating or reducing harmful microorganisms from inanimate objects and surfaces. Fumigation is the process by which we can sterilize the enclosed area by injecting the GIAN chemical in the form of mist (mixture of air and chemical) which will kill or destroy microbes present in the air. It is very important to maintain good indoor air quality (IAQ) in any closed environment to ensure health and safety for the passenger so that when the passenger comes out and mix with other public spreading of disease is prevented. A significant consideration in environmentis the control of aerosols like bacteria, virus, and fungus. Aerosols are solid and liquid particles.
