@BenDelecto @angie_rasmussen Early in vaccine rollout there were some warnings that severe cases/deaths might NOT be reduced much, if vaccines were more effective in stopping milder cases in healthier people. Fortunately turned out not to be true, but trials didn't rule it out.
@BenDelecto@angie_rasmussen在疫苗推出初期，有一些警告称，如果疫苗能更有效地阻止健康人群中较轻的病例，严重病例/死亡可能不会减少多少。幸运的是，事实证明并非如此，但试验并没有排除这种可能性。