From today’s WaPo, a preliminary report from the VA on 620,000 veterans (not 2.7% but 0.19% of the US population) and the waning benefit of their vaccinations:
Using data from the Veterans Health Administration, the largest health system in the United States, researchers compared coronavirus infections by vaccination status among 620,000 veterans — representing 2.7 percent of the U.S. population — from Feb. 1 to Aug. 13.
Although the report has yet to be peer reviewed and evaluated, it indicates that virus immunity decreased over time and that its decline was different for each of the three vaccines available in the United States.
According to the study, the greatest waning was presented by the Johnson & Johnson product, with protection falling from 88 percent in March to 3 percent in August. In the same period, it declined for the Pfizer-BioNTech vaccine from 91 percent to 50 percent. For Moderna, protection fell from 92 percent to 64 percent.