But there are risks to any strategic decision. The human body, after all, is a subtle structure. The same vaccine can elicit different reactions in different people. In extreme cases, vaccination can cause an adverse reaction and even kill someone.
但任何決策都有風險，尤其人體是極其精微的構造，同一支疫苗在不同接種者身上引發的反應各不相同，極端情況下的確有可能造成傷害甚至死亡。