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1. The patient's condition worsened after receiving thetreatment.
患者在接受治疗后病情恶化。
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2. This diseaseis caused by a virus and can betransmitted to others.
这种病是由病毒引起的,可以传染给他人。
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3. Theresearch team has been workingon developing a vaccine for thisdisease.
研究团队一直在努力开发这种病的疫苗。