@BenDelecto @angie_rasmussen The goal was just to get a vaccine that "worked" ASAP. Symptomatic disease was the easiest to measure. You reduce that and you have a vaccine that works. Then hopefully it does more (turns out it did).
@BenDelecto@angie_rasmussen的目标只是尽快获得一种“有效”的疫苗。症状性疾病是最容易测量的。你减少了这一点，你就有了一种有效的疫苗。然后希望它能做得更多（事实证明它做到了）。