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astrazeneca vaccine

British and Russian scientists are teaming up to trial a combination of the Oxford-AstraZeneca and Sputnik V vaccines to see if protection against Covid-19 can be improved.

According to the researchers, mixing two similar vaccines could lead to a better immune response in people.

The trials, to be held in Russia, will involve over-18s, although it’s not clear how many people will be involved.

Oxford recently published results showing their vaccine was safe and effective in trials on people.

The researchers are still collecting data on the effectiveness of the vaccine in older age groups while waiting for approval from the UK regulator, the MHRA.

AstraZeneca said it was exploring combinations of different adenovirus vaccines to find out whether mixing them leads to a better immune response and, therefore, greater protection.

The Oxford vaccine, developed in partnership with AstraZeneca, and the Russian Sputnik vaccine, developed by the Gamaleya Research Institute in Moscow, are similar because they both contain genetic material from the Sars-CoV-2 spike protein.

They work differently to the Pfizer-BioNTech vaccine, which has been approved in the UK, Canada, Bahrain, Saudi Arabia and recommended for approval by medical experts in the US.

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Early results from late-stage trials of the Russian vaccine have shown promising results.

Russia was the first country to register a Covid vaccine for emergency use – in August, despite only having been tested on a few dozen people.

Sputnik V is now being offered to Russians as part of a mass vaccination campaign.

AstraZeneca said it was “working with industry partners, governments and research institutions around the world, and will soon begin exploring with Gamaleya Research Institute in Russia to understand whether two adenovirus-based vaccines can be successfully combined”.