@chud_meridian @TheWisestHuman @NateSilver538 How fast they spread matters. It buys time to do lab studies, understand clinical differences, time to distribute boosters if useful (or potentially updated ones if needed), etc.
@最聪明的人类的子午线自然决定了它们传播的速度。它为做实验室研究、了解临床差异、分发有用的助推器（或在需要时可能更新助推器）等赢得了时间。