You asked our science correspondent Derrick Williams: Why do children show so few symptoms of COVID-19 and have fewer side effects?
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Officials say 60% of Africa's 1.3 billion people will need to be vaccinated against COVID-19 in order to achieve continent-wide herd immunity. But with cases surging, governments are scrambling to secure supplies.
Health Minister Jens Spahn has defended the extension and tightening of Germany's lockdown, warning that easing COVID curbs prematurely could make the country more vulnerable.
The EU is considering imposing more travel restrictions to try and curb the coronavirus. Even more? This is taking action just so you're seen to be doing something, says DW's Bernd Riegert.
The Brazilian COVID-19 variant is of particular concern. The immune response of vaccinated people and patients who have recovered from COVID-19 may not be sufficient to fend off the mutated virus.
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