Is
Israel is ground zero for the booster shot. The results of their latest vaccinations should be available quickly.In a few years we will know more on how long natural immunity lasts, or if any so-called booster shots help.
Or we could know in a 6 months if natural immunity only lasts for 6 months, in different age groups, etc., etc..
I mentioned from day one that the Wuhan Flu is here, there and everywhere to stay. I expected a resolution in 4 to 5 years from day one. All the details on vaccines, boosters and natural immunity and mutations is a work in progress that will take years to understand.