Warning icon The browser that you are currently trying to use to access the HCAI DCS system is not a compatible browser version.

HCAI DCS system is best viewed in Internet Explorer 9, 10, 11, Firefox, Google Chrome and Microsoft Edge.
Help | AAA
UK Health Security Agency
UK Health Security Agency

What we do

The UK Health Security Agency (UKHSA) is responsible for protecting every member of every community from the impact of infectious diseases, chemical, biological, radiological and nuclear incidents and other health threats. We provide intellectual, scientific and operational leadership at national and local level, as well as on the global stage, to make the nation's health secure. UKHSA is an executive agency, sponsored by the Department of Health and Social Care and was formally established on 1 April 2021.

Our Functions


Anticipating and taking action to mitigate infectious diseases and other hazards to health before they materialise, for example through vaccination and influencing behaviour.


Detecting and monitoring infectious diseases and other hazards to health, including:
  • novel diseases
  • new environmental hazards
  • other threats through world class health
  • surveillance
  • joined-up data
  • horizon scanning
  • early warning systems

Analysing infectious disease and other hazards to health to determine how best to control and respond to them. We will do this through coordinated and intelligent data analysis, modelling, and evaluation of interventions based on robust evidence and developing the knowledge base.


Taking action to mitigate and resolve infectious diseases and hazards to health when they occur, through direct delivery. We will support health protection system partners with tools and advice, engaging with citizens, and flexibly deploying resources, including scaling operations at pace..


We will provide health protection system leadership, effective preparation and response to the full range of threats to health and strengthen the health protection system and workforce in partnership with:
  • wider central government
  • the devolved administrations
  • public health agencies for Scotland, Wales and
  • Northern Ireland
  • local authorities
  • the NHS
  • academia and industry