分三类。没有入院的增加的幅度非常非常有限。没有标题惊悚。都喜欢搞个大新闻 The study’s enrollment period ended before vaccines were widely available, so 99.7% of infected veterans were unvaccinated when they contracted COVID-19. Therefore, the paper doesn’t address whether long-term cardiovascular problems may arise after breakthrough infections in already vaccinated people. (A new analysis tackling that question is now under review at a journal.) Another limitation of the study is that the veteran population skews older, white, and male: In all three groups, about 90% of patients were men and 71% to 76% were white. Patients were in their early 60s, on average