Which of the following is not a mode of transmission for infections?

Infection transmission modes are categorized based on how pathogens are spread from one host to another. Direct contact, indirect contact, and vector-borne transmission are all recognized modes of transmission.

Direct contact involves the transfer of microorganisms through physical interaction between an infected person and a susceptible host, such as through skin-to-skin contact. Indirect contact refers to transmission via an intermediary object or surface, where pathogens are transferred from one person to a surface and then to another person who touches that surface. Vector-borne transmission occurs when an insect or another organism, such as mosquitoes or ticks, carries pathogens from one host to another.

Touch transmission is not a scientifically recognized term in the context of infection transmission. Instead, it seems to relate to direct contact and lacks a formal definition or classification as a distinct mode of transmission. Therefore, choosing that option accurately identifies a term that does not fit within the established categories of infection transmission.