Israel’s vaccine advisory panel has recommended a fourth dose of a Covid-19 shot for all adults, a world first, as the country battles a surge in infections driven by the Omicron coronavirus variant.
The move follows research showing fourth doses doubled protection against symptomatic Covid and increased protection against severe illness by three to five times, compared with three doses.
Other countries, such as the UK, US and Chile, have signed off on fourth doses for immunocompromised people, such as those living with HIV or certain transplant recipients, but have hesitated on launching a widescale second booster campaign.
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