Department of Health

Infectious diseases are spread from one person to another or from an animal to a person. The spread of a communicable disease usually happens via airborne viruses or bacteria (for example, by coughs and sneezes), but disease can also spread through contact with blood or other bodily fluid.

Pandemic influenza and large-scale vector-borne diseases, food-related illness and water-borne diseases can require an emergency response.

Reviewed 23 March 2022

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