Medical research

Designing better contact-tracing apps for the next pandemic

As COVID-19 began to spread last spring, apps were developed to track cellphone signals and other data so people who had been near those who were infected could be notified and asked to quarantine. The novel coronavirus rapidly ...

Diseases, Conditions, Syndromes

'This is not a game': Global virus death toll hits 2 million

The global death toll from COVID-19 topped 2 million Friday, crossing the threshold amid a vaccine rollout so immense but so uneven that in some countries there is real hope of vanquishing the outbreak, while in other, less-developed ...

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