Many Chinese were infected by needles that were reused during mass vaccination programs for tuberculosis, tetanus and encephalitis from the 1970s to the 1990s.

• 1970年至1990年间，中国大量开展接种肺结核、破伤风、脑炎等疫苗，由于针头的重复多次使用，许多人感染了病毒。