Mixing Pfizer and AstraZeneca COVID-19 vaccines increases mild side effects but is safe, study shows - MarketWatch
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Germany recommends mixing Covid vaccines, saying it gives 'significantly superior' immune response | Daily Mail Online
Allowing people to mix COVID-19 vaccines could cut into Pfizer and Moderna's revenue next year - MarketWatch
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oxford astrazeneca vaccine efficacy: Oxford-AstraZeneca vaccine effective but questions remain for elderly - The Economic Times
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