"Israel started preparing for Omicron early on. This bought us time, which we are using to our advantage. Last week, Israel began vaccinating its most vulnerable citizens with the fourth dose of the COVID vaccine," said Bennett.
He confirmed the country's top medical officer had approved the shot.
Earlier on Sunday, the country's top health official said Israel could reach herd immunity amid surging Omicron infections, as the country approved the use of Merck & Co's MRK.N molnupiravir anti-viral pill for COVID-19 patients.