In the chain of infection, what is the first link (i.e., the chain of infection starts with which component)?

In the chain of infection (infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, susceptible host), which link do standard precautions primarily break?

In the chain of infection (infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, susceptible host), what is the most accurate outcome if one link in the chain is missing or effectively broken?

In the chain of infection, what is the first step in infection control to prevent disease transmission?

In the chain of infection (infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, susceptible host), what is the most likely outcome if any one link is effectively broken?

In the chain of infection, what is considered the first step in infection control?

In the chain of infection, which link is most directly interrupted by standard precautions (e.g., hand hygiene, gloves, gowns, masks)?

In the chain of infection (infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, susceptible host), which link is generally considered the easiest to break to prevent the spread of disease?