After the 1960s, China began to inoculate BCG, pertussis, diphtheria, tetanus, measles and poliomyelitis vaccines.
After the 1960s, China began to inoculate BCG, pertussis, diphtheria, tetanus, measles and poliomyelitis vaccines.
六十年代后，中国开始在大、中城市接种卡介苗、百日咳、白喉、破伤风、麻疹、脊髓灰质炎的疫苗的工作。