We catch up with a couple of participants who took part in Oxford University’s human challenge trial at a follow-up appointment a few months after they left our special quarantine unit. Trial leader Helen McShane explains how infecting people with COVID-19 will help with vaccine creation.

Healthy? Aged 18-30? Interested in finding out more? Check your eligibility: https://trials.ovg.ox.ac.uk/trials/covid-19-challenge-study-cov-chim-01