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资源列表 > A new study says fear or complacency about vaccinations can allow preventable diseases such as polio, measles and whooping cough to spread. Scientists say preventing vaccine scares should be part of global immunization policies.
A new study says fear or complacency about vaccinations can allow preventable diseases such as polio, measles and whooping cough to spread. Scientists say preventing vaccine scares should be part of global immunization policies.
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