HealthGlobal issuesWhy COVID vaccines needed an update To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoHealthGlobal issues08/31/2022August 31, 2022US health officials have approved updates to COVID-19 vaccines that target the latest strains of the omicron variant. The tweaked booster shots could be available in the coming days. DW explains how the new COVID vaccines work.https://p.dw.com/p/4GHpIAdvertisement