Breakthrough infections were also found after the fourth injection.
150 people took part in the study, who had received a fourth corona shot from Pfizer two weeks earlier. In addition, the data of 120 people who received a fourth corona jab with Moderna a week ago were also examined. They had previously received three shots of Pfizer.
Israel is one of the few countries worldwide that has already started administering a fourth corona jab. It is reserved for people with immune disorders, medical personnel and people older than 60 years.
Based on the results, Regev-Yochay said he would not recommend a general fourth corona shot. She also questioned the benefit of giving a fourth shot to healthy people over 60.