Winter Coronavirus (COVID-19) Infection Study

This study has now closed. The Winter Coronavirus (COVID-19) Infection Study (Winter CIS) provided vital information on the effects of coronavirus (COVID-19), on the lives of individuals, the community and healthcare services. Information from the study helped the NHS prepare for potential winter pressures and improved public awareness of COVID-19 infection levels. It was run by the ONS and commissioned and funded by the UK Health Security Agency (UKHSA).

  • Information about the study

    Information about the Winter Coronavirus (COVID-19) Infection Study (Winter CIS) and why it was created, as well as information on how and why participants were selected.

  • How to take part

    How participants could take part in the Winter Coronavirus (COVID-19) Infection Study (Winter CIS) and information about the questionnaire.

  • Data privacy and protection

    How we have used and shared the data you provided for the Winter Coronavirus (COVID-19) Infection Study (Winter CIS).