Where a person has been exposed, or may have been exposed, to a biological hazard at work, the PCBU must do all that it reasonably can about the risk to that person's health and safety. That may mean arranging a prompt medical assessment or getting the person to a hospital emergency department without delay; for exposures carrying significant health risk, the person may need blood tests, treatment after exposure to prevent infection (post-exposure prophylaxis where HIV or hepatitis B is known or suspected in the body substances involved), medical counselling and ongoing health checks. Depending on the hazard, the PCBU may also need specialist advice, from health authorities for instance, on how to contain the exposure so that nobody else is affected.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.