While Americans are mulling over the likely prospect of getting their first COVID-19 vaccine Booster shot this month, Israeli citizens have already taken their third Pfizer shot (Booster), with Israeli medical czar Nitzan Horowitz indicating that a fourth shot and second Booster is on the horizon. Those who do not receive a booster shot will no longer be considered vaccinated as it relates to restrictions if more than six months have elapsed since their second shot, Israel’s coronavirus czar said Sunday. That change will go into effect on October 1. His message was meant for his fellow Israelis, but it is a warning to the world. Israel has among the world’s highest levels of vaccination for COVID-19, with 78% of those 12 and older fully vaccinated, the vast majority with the Pfizer vaccine. Yet the country is now logging one of the world’s highest infection rates, with nearly 650 new cases daily per million people. More than half are in fully vaccinated people, underscoring the extraordinary transmissibility of the Delta variant and stoking concerns that the benefits of vaccination ebb over time. Is this what’s coming here to the US?