We ask our science correspondent Derrick Williams How did the Spanish flu pandemic end, even without treatments or a vaccine?
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How many people have been vaccinated? Which vaccines are approved? Here's the global progress on vaccination against SARS-CoV-2, the virus that causes COVID-19.
The German pharma company cited "the unprecedented context of at least 13 variants" in explaining why its vaccine fell short of expectations in an interim analysis.
The German biotech company has had a dream run since its market debut in August as investors bet on its mRNA platform. But the firm's fortunes seem to be turning after its COVID-19 vaccine showed disappointing efficacy.
Around half of the German population have now received at least one shot of a COVID-19 vaccine. Elsewhere, experts say Japan must ban spectators at the Olympics. Follow DW for the latest.
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