Covid booster 88% effective against hospital treatment with Omicron

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1. Hospitalization risk reduction: one shot: 52%, 2 shots: 72% (fades to 52%..), 3 shots: 88%

The UKHSA analysed more than 600,000 confirmed and suspected cases of the Omicron variant up to 29 December in England.

It found that a single vaccine dose reduced the risk of needing hospital treatment by 52%. Adding the second dose increased the protection to 72%, although after 25 weeks ((~half a year)) that protection had faded to 52%.

And two weeks after getting a third dose, that protection against hospitalisation was boosted to 88%.