OK. But how long does this protection last? And if it isn't forever, then does the protection diminish back to an unvaccinated state, or is there a time when the vaccinated person is even less protected than had he not been vaccinated at all in the first place? iow is there a vulnerable period for the vaccinated when the vaccine is wearing off and their immune system is actually compromised rather than bolstered or strengthened?Liar.
Two studies1,2 from Israel, posted as preprints on 16 July, find that two doses of the vaccine made by pharmaceutical company Pfizer, based in New York City, and biotechnology company BioNTech, based in Mainz, Germany, are 81% effective at preventing SARS-CoV-2 infections. And vaccinated people who do get infected are up to 78% less likely to spread the virus to household members than are unvaccinated people. Overall, this adds up to very high protection against transmission, say researchers.