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Israel offers third Pfizer Covid vaccine to at-risk adults as delta variant spreads

04:30

Israel has become the first country to introduce a Pfizer Covid-19 vaccine booster shot as the delta variant spreads across the country. NBC News’ Raf Sanchez reports from Ramat Gan, Israel, on who the booster vaccine is being made available to and how the rollout of a third jab could impact the global vaccine effort.