The HPA carries out a broad spectrum of work relating to prevention of infectious disease.
This includes infectious disease surveillance, providing specialist and reference microbiology and microbial epidemiology, co-ordinating the investigation and cause of national and uncommon outbreaks, helping advise government on the risks posed by various infections and responding to international health alerts.
Influenza occurs most often in winter and usually peaks between December and March in the northern hemisphere. Illnesses resembling influenza that occur in the summer are usually due to other viruses.
Healthcare associated infections are infections that are acquired in hospitals or as a result of healthcare interventions. There are a number of factors that can increase the risk of acquiring an infection, but high standards of infection control practice minimise the risk of occurrence.
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