http://www.cnn.com/2021/10/06/health/pfizer-vaccine-waning-immunity/index.html
Spoke to my cousin in Athens a couple of days ago. His son in his early twenties had covid twice, he and his wife unvaccinated and in close contact never even got sick. It’s not the norm, so Go figure.
Anyway, geezers who had the Pfizer should get the boost pronto.