Professor Sarah Gilbert, who is leading the University of Oxford coronavirus vaccine trial, said that when Covid-19 transmission was high, lockdown was imposed to bring the rate down
A coronavirus vaccine professor at Oxford University says there is now ‘little chance’ of proving if it works due to low transmission rates in the UK.
Professor Sarah Gilbert, leading the University of Oxford vaccine trial, said that when Covid-19 transmission was high, lockdown was imposed to bring the rate down.
But since then rates have dropped, and the trial relies on a sufficient number of volunteers to have been exposed to the virus to see whether a vaccine protects them or not.
However, if their chances of being in contact with an infected person are low, it will take a long time to demonstrate the efficacy of a vaccine candidate.
Prof Gilbert told the House of Lords Science and Technology committee: “Of course, what happened was that because it [transmission] actually increased much more rapidly than anybody thought was going to happen, we had the lockdown, which fortunately reduced transmission.
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