A real life account of the deadly Nipah virus outbreak in Kerala, and the courageous fight put on by several individuals which helped to contain the epidemic 关于人类资(zī )质(zhì )方面，按照系统的划(huá )分，目(🚢)前划分为(🚊)九个等(děng )级，从(cóng )最(zuì )低到最高分别为F级、E级、D级、C级、B级、A级、S级、SS级、SSS级。