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19th August 2021
01:45pm BST

In total, there have been 88,401,088 vaccinated administered[/caption]
Previous studies showed that vaccinated people who contracted the alpha variant had far lower viral loads than the unvaccinated. This formed the basis for much of the government's Covid campaign, such as vaccine passports and the changes to the NHS Covid App that meant double-jabbed people no longer had to self-isolate.
"People who aren't yet vaccinated may not be as protected from the delta variant as we hoped," continues Walker.
"It comes back to this concept of herd immunity, and the hope that the unvaccinated could be protected if we could vaccinate enough people. But I suspect the higher levels of the virus in vaccinated people are consistent with the fact that unvaccinated people are still going to be at high risk."
Dr Koen Pouwels, a senior researcher at Oxford University's Nuffield Department of Population Health, said that while vaccinations reduce the chance of people catching Covid, "they do not eliminate it".
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Changes to the NHS App were made so that double-jabbed people did not have to self isolate[/caption]
However, vaccines are still the best weapon against people becoming seriously ill with Covid, Walker stated: "There are lots of reasons why the vaccines may be very good at reducing the consequences of having the virus," she said.
"You may well still have a milder infection and might not end up getting hospitalised.
"While the results are important, they aren't everything and it is really important to remember the vaccines are super-effective at preventing hospitalisations."
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