Two of the four new cases are passengers who have recently returned from France. Both of them have received three shots of the Pfizer vaccine against COVID-19.
The third case is a patient who was also vaccinated with three Pfizer doses, and was infected with the variant after coming into contact with a passenger who returned from South Africa.
A person who returned from the United States, and tested positive for Omicron despite receiving three doses of the Moderna vaccine is the fourth case.
Another 24 cases of the variant are suspected in Israel, but the results of their genomic sequencing tests have yet to be obtained, according to the ministry.