‘It wouldn’t exist’: Viagra inventor tells how Welsh miners began its rise

It was the ultimate serendipitous discovery: a failed heart medication that became a multibillion-dollar erectile dysfunction drug. But the blockbuster story of Viagra could have…

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Single Pfizer jab can reduce asymptomatic Covid infections by 75%

A single dose of the Pfizer vaccine can reduce asymptomatic infections by 75%, according to research that suggests the jab could substantially curtail transmission of…

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