A WHO spokeswoman said the agency does not expect widespread vaccinations against COVID-19 until the middle of next year, underlining the significance of rigorous checks on their effectiveness and safety.

“We are not expecting to see widespread vaccination until the middle of next year,” she told journalists at a briefing in Geneva.

“This phase three must take longer because we need to see how truly protective the vaccine is and we also need to see how safe it is,” added Harris, referring to vaccine clinical trials.

Aljazeera

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