Reaching very high levels of immunity from say 90% vaccination rates with more contagious virus variants in circulation seems the ultimate goal for vacc rollouts across the world. Good news is Europe - and UK especially - is reaching such levels for high priority groups now. A 🧵 
1) Europe and the US are now facing the challenge of ensuring that up to 90% of also younger age groups ultimately gets vaccinated. Israel - a global frontrunner in vacc rollouts - offer important insights on how to nudge people less personally at risk of covid19 to get jabbed.
2) "The green-pass program worked—not because it proved one’s vaccination status and thereby enabled access to public places, but because it spurred the hesitant to get inoculated. And it worked." economist.com/by-invitation/…
3) Vaccine passports is certainly about enabling people to return to their normal lives and securing that as many companies, vacation spots, restaurants etc. economically survive the pandemic and that the economy can quickly restart. But that is not all.
4) Vaccine passports, enabling vacc'ed people, people recently tested negative or recovered from Covid19, to enter restaurants, bars, gyms, theaters, public transportation etc. is equally much about nudging everyone, especially younger people, to get vacc'ed as fast as possible.
5) The EU's introduction of "vaccine passports" will hence help its rollout among younger groups potentially dramatically, while @joebiden's unwillingness to implement a federal one in the US is an obstacle for reaching very high overall vacc rates among all Americans. END
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