Diseases transmitted mainly through contact are usually divided into two categories, including direct contact transmission and indirect contact transmission, such as direct contact transmission of skin diseases, including chickenpox and scabies. And indirect contact transmission mainly refers to the transmission caused by pathogen-contaminated objects, such as daily household items, towels, tableware, and doorknobs. This contact is all done by the hands, and when the hands go to touch their mouth, nose, and eye parts, they help pathogens to complete fecal-oral, respiratory, and mucosal transmission, including the current new coronavirus, E. coli, rotavirus, and norovirus, all of which can be transmitted by transmission by indirect contact.