WHO director-general warns there may never be a 'silver bullet' for COVID-19

World Health Organization Director-General Tedros Adhanom Ghebreyesus said on Monday he is hopeful that the six coronavirus vaccine candidates now in their third phase of clinical trials will be effective, but warned that there is "no silver bullet at the moment and there might never be."

Until there is an approved vaccine, the world must follow "the basics" of disease control, he said, which involves testing, isolating, tracing, and quarantining, as well as social distancing, regular hand washing, and wearing masks. "The message to people and governments is clear: Do it all," Tedros added.

On Jan. 30, the WHO declared COVID-19 a public health emergency, and at the time "there were fewer than 100 cases and no deaths outside of China," Tedros said. Today, worldwide there are 18.1 million COVID-19 cases, with more than 690,000 people dying of the virus, according to the Johns Hopkins University coronavirus tracker.

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