One remaining uncertainty is how severe the disease caused by the omicron variant is compared to disease caused by previous variants. Whilst it may take several weeks to fully understand this, governments will need to put in place plans now to mitigate any potential impact. Our results demonstrate the importance of delivering booster doses as part of the wider public health response.

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Quote text and notes from Wikiquote: Azra Ghani (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.