Previously healthy 43-year-old man who received a booster shot in August hospitalized at Tel Hashomer in intensive care unit; doctors call it a 'worrying development'

Beilinson Hosptial research, believed to be the largest using detailed imaging technique, concludes outcome is 'favorable,' long-term effects not expected

Data from 2.5 million who got vaccine finds phenomenon afflicted only 0.002%, and was found to be serious in only 2% of those cases that did develop

Mild adverse reactions are significantly less compared to previous COVID shots; of 3.3 million boosted Israelis, just 19 report serious side effects, may not all be tied to vaccine