There's a WSJ article on boosters in Israel, explaining their decision (paywall).

Also discusses their rapid response to all thing covid, and in part credits the fact that most of their folks have served or been involved in military/wartime crises so they're good at adapt, improvise, and overcome.

"Those involved in the decision-making process in Israel credit a culture of debate and a willingness to improvise, instilled in part by long careers in the military common among senior health professionals, and tested during national security crises."