Oxford vaccine could substantially cut spread

Oxford vaccine could substantially cut spread

The Oxford-AstraZeneca vaccine could lead to a “substantial” fall in the spread of the virus, say scientists.

The impact of Covid vaccines on transmission has been a crucial unknown that will dramatically shape the future of the pandemic.

The study, which has not been formally published, also showed the vaccine remained effective while people waited for a second dose.

It was 76% effective during the three months after the first shot.

The impact on transmission is critical.

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