A surge of Omicron infections could see Israel reaching herd immunity, the country's top health official said on Sunday as daily cases continued to climb, Reuters reports.

Worldwide infections have hit a record high, with an average of just over a million cases detected a day between Dec. 24 and 30, according to Reuters data. Deaths, however, have not risen in kind, bringing hope the new variant is less lethal.

Until late December, Israel managed to stave off Omicron to some degree but with infection rates now gaining pace, daily cases are expected to reach record highs in the coming three weeks. This could result in herd immunity, said director-general of the health ministry, Nachman Ash.