Challenge trials have been used for hundreds of years but a lot of people question how ethical is to deliberately expose people to an infectious disease.
More than 140 different organisations around the world are currently trying to discover a vaccine for Covid-19.
But could challenge trials be used to speed up the process? BBC News
See also:
- NHS Covid-19 app: England and Wales get smartphone contact tracing for over-16s BBC News
- NHS Covid-19 app: How England and Wales' contact-tracing service works BBC News
- Covid-19: UK volunteers could be given virus to test vaccine BBC News
- Covid-19: Daily reported UK cases rise by a quarter BBC News
- New 'traffic-light' lockdown system that will send automatic alerts to phones is set to be used
- Boris Johnson urged to take action on 'long Covid' which causes symptoms lasting for months The Daily Mail
- Britain hasn't learnt from March and is about to make another 'mistake', SAGE members warn The Daily Mail
- Almost 10,000 people a day contracting Covid in UK, Hancock says The Guardian
- Arrival of NHS contact-tracing app heralds return of QR codes The Guardian
- Is the UK ready for a Covid second wave? – podcast The Guardian
- Coronavirus: Boris Johnson defends testing boss Dido Harding and hits back at 'unseemly' attacks Sky News
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