@kknnaabb @_mbdr_ Vaccination rate is certainly one factor, but certainly not the only one, as varying numbers of people died in different places under different conditions before vaccines existed, with the same vaccine rate of course (zero).
@kknnaabb @_mbdr_ 疫苗接种率当然是一个因素，但肯定不是唯一的因素，因为在疫苗出现之前，不同地点在不同条件下死亡的人数不同，当然疫苗接种率相同（零）。