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The Agency identifies and responds to health hazards and emergencies caused by infectious disease, hazardous chemicals, poisons or radiation.

Click Topics for the A-Z directory, or select one of the four main areas of HPA expertise.

The links below highlight a range of currently popular topics.



Flooding presents a number of risks, drowning being the most obvious. Injury can be caused by falling into flowing water or from hidden dangers under the water. The stress of being flooded can have an impact on mental health.

›› Flooding

Escherichia coli (VTEC) O157

The most important VTEC strain to cause illness in the UK is E. coli O157. This can be found in the intestine of healthy cattle, sheep, goats and a wide range of other species.

›› Escherichia coli (VTEC) O157

Swine Influenza

Swine flu is a respiratory illness caused by the type A flu (H1N1) virus.

›› Swine Influenza


Radon is a natural radioactive gas. You cannot see, hear, feel or taste it. It comes from the minute amounts of uranium that occur naturally in all rocks and soils.

›› Radon