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When it comes to Omicron, multiple studies are pointing to how booster shots can help.
Omicron: Why do boosters work if two doses struggle?
Omicron and COVID boosters: everything you need to know
Singapore to press on 'more urgently' with COVID-19 vaccine booster shots amid Omicron variant concerns
Pfizer Booster Shots Are Effective Against Omicron Variant, Israeli Study Says