@TRyanGregory @MichaelSFuhrer @JMFischer The question rests on whether you define the herd immunity threshold in terms of R_0 or R_eff. Customarily it's the former, but the distinction is a bit sloppy in this thread (which assumes the latter, but not so clearly).
@TRyanGregory @MichaelSFuhrer @JMFischer 问题在于您是否根据 R_0 或 R_eff 定义群体免疫阈值。通常它是前者，但这个线程中的区别有点草率（假设后者，但不是那么清楚）。