Can 'immunity passports' help us get back to normal?

Professor Robert West (UCL Epidemiology & Health) comments on the idea of immunity passports and explains that we don’t know enough about Covid-19 and stresses that even if a patient has recovered from the virus, there is nothing to prevent them from getting it again.

Listen: BBC World Service Radio’s ‘Business Daily’ (from 7 mins, 20 secs)