UK 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.
Mixing two similar vaccines could lead to a better immune response in people.
(Reuters) - China ordered inspections of imported cold chain products to prevent the spread of COVID-19, while Australia said its international borders would stay shut for now and health officials warned Americans could face a "rough" winter.
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