The UK Health Security Agency (UKHSA) is a government agency in the United Kingdom. It has been responsible for public health in the UK since April 2021. It guards the population against infectious disease. This used to be done by Public Health England. It is part of the Department of Health and Social Care.
In 2022, after 30 children died in the United Kingdom from streptococcal pharyngitis, the Agency sent out a communication which was said to have flooded emergency services with the worried well.