Covid infection protection waning in double jabbed

Researchers say they are seeing some waning of protection against Covid infections in double-jabbed people. The real-world study includes data on positive Covid PCR test results between May and July 2021 among more than a million people who had received two doses of Pfizer or AstraZeneca vaccine. Protection after two shots of Pfizer decreased from 88% at one month to 74% at five to six months. For AstraZeneca, the fall was from 77% to 67% at four to five months. Waning protection is to be expected, say experts.