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WHO chief encouraged by vaccine results but says world has 'long way to go'

WHO chief encouraged by vaccine results but says world has 'long way to go'
World Health Organization director-general Dr. Tedros Adhanom Ghebreyesus on Friday said he was encouraged by news earlier in the week that the Pfizer COVID-19 vaccine was 90 per cent effective in Phase 3 clinical trials, but advised the world still "has a long way to go."

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