"Having said that, the data from Singapore probably aren’t quite as unexpected as the data from Israel and Europe. Singapore hadn’t really seen any waves of Covid prior to the autumn of 2021, so there may have been more ‘dry tinder’ in the population when the Delta wave got underway. Hong Kong is currently going through what looks to be a deadly Omicron wave, its deadliness apparently driven by the country’s low elderly vaccination rate. So even if vaccine effectiveness against death has been somewhat overstated, using the vaccines to help achieve focussed protection certainly makes sense."
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