题目内容
（请给出正确答案）
[主观题]
The author argues that vaccinations are both a blessing and a curse because______.A．saving
The author argues that vaccinations are both a blessing and a curse because______.
A．saving the many would not necessarily justify the death of the few
B．some vaccines, such as the smallpox vaccine, have negative side effects
C．they don't always work
D．while many lives are saved, some are actually killed by the vaccine
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