Novavax says Covid-19 vaccine is 89% effective in UK trial, but less so in South Africa

A new Covid-19 vaccine from Novavax was 89% effective and appeared to offer protection against some variants of the coronavirus...

Putin signs law allowing him to run for two more terms as Russian President

Russian President Vladimir Putin has signed a law paving the way for him to run for two more presidential terms,...

Covid-19 infections of vaccinated people are expected. But the unvaccinated are ‘the big highway of transmission,’ experts say

Tens of thousands of vaccinated people may catch Covid-19, but the majority will not fall severely ill — a testament...

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