Health systems in most of Brazil's largest cities are close to collapse because of Covid-19 cases, its leading health institute warns.
Unlocking too quickly would lead to a substantial surge in Covid infections, the UK's chief medical adviser says.
An estimated 160 million Covid-19 vaccinations have been administered so far globally, but most of that has been in the US and Europe.
Covid-19: Vaccine offers for all those aged 56 or over
Germany's vaccine commission has approved the use of the Oxford-AstraZeneca jab in people aged over 65.
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A single shot of either the Oxford-AstraZeneca or the Pfizer-BioNTech Covid jab reduces the chance of needing hospital treatment by more than 80%, an analysis in England shows.
The Brazil coronavirus variant now found in the UK appears more contagious and may evade immunity provided by past infection, scientists say.
US regulators have formally approved the single-shot Johnson & Johnson (J&J) coronavirus vaccine, the third jab to be authorised in the country.
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Ghana has become the first country to receive coronavirus vaccines through the Covax vaccine-sharing initiative.
The first data on the UK Covid vaccine rollout suggests it is having a "spectacular" impact on stopping serious illness, researchers say.
