How do you vaccinateagainst your family legacy of breast cancer or your constant exposure to secondhand cigarette smoke?
乳腺癌的家 族遗传,或者长期吸二手烟,对于这些因素,怎样才能进行免疫接种呢?
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Clifford said the USDA, which is responsible for approving any swine flu vaccinations for pigs, will not require hog farmers to vaccinateagainst the human strain.