Join a COVID-19 clinical trial

The Principle trial aims to find treatments that reduce hospital admission and improve symptoms for people with COVID-19.

You could be eligible to join if:

  • You have had these symptoms for fewer than 15 days – a continuous new or worsening cough, or a high temperature
  • You are aged 50 to 64 with a pre-existing illness
  • You are aged 65 and above

Please view the Principle information leaflet.

If you wish to find out more information and register to join the trial, please visit