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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.
youdao
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少于3种的免疫接种可以提供足够的保护吗？
Could fewer than three vaccinations provide adequate protection?
youdao
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少于3种的免疫接种可以提供足够的保护吗？
Could fewer than three vaccinations provide adequate protection?
youdao