Sanitization is a process of cleaning certain area or surface in such a manner so that it is made bacteria-free and elementally clean all types of microbes and viruses that can infect the human body and cause different kinds of diseases.
Hand Sanitization is a process of cleaning the human body especially hands that can get infected with any contagious microbes when the hands touch any infected surfaces, animals, or humans.
Surface Sanitization is a process of removing or destroying microorganisms from places like clothing, vegetables, water, and all kinds of hard surfaces.
That is to say, sanitization is a process of removing harmful microbes with the help of chemicals that doesn’t harm the human body. The chemicals are used in measured quantities and diluted with water or other diluting agents. Sanitization can also be done with the help of heat and some other methods but that cannot be applied in every context.