日本人不信，後果很嚴重。
In 1993 the MMR vaccine was withdrawn in Japan due to high rates of aseptic meningitis from the mumps component. This was followed in 1994 by removal of the vaccine requirements to attend school. The result? A marked increase vaccine-preventable illness. 11,991 cases of rubella in the first six months of 2013 with 10 cases of congenital rubella. 76% of cases were in the unvaccinated. For comparison:
2004–2012, 79 cases of rubella and six cases of CRS were reported in the United States; all of the cases were import-associated or from unknown sources.
100%-76%=24%，接種了疫苗的人
從這個例子可以看出來，疫苗可以增加人體對病毒的抵抗力，但不是百分之百的刀槍不入。
預防疾病大規模傳播，是所有公民的責任和義務。
預防疾病大規模傳播，是所有公民的責任和義務。
