Johnson & Johnson's vaccine appears to protect against COVID-19 with just one shot. Not as strong as some rivals but it's still potentially helpful for a world in dire need of more doses. Betty Yu..
A fourth coronavirus vaccine could be approved for use in the UK within weeks as late-stage trials suggested it was 89% effective in preventing Covid-19.
The UK has secured 60 million doses of the..
Coronavirus pandemic: 50,000 doses of Moderna vaccine are available in France
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