你必须采取一切合理的预防措施，保护自己和家人。
You must take all reasonable precautions to protect yourself and your family.
预防性给予氨苯丙胺或沙利霉素也可以保护实验感染的绵羊。
Prophylactic administration of amprolium or salinomycin also protected experimentally infected sheep.
你可通过预防接种保护自己免患乙型肝炎。
You can protect yourself against hepatitis B by being vaccinated.
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