Sore throat Warning: severe or persistent sore throat or sore throat that occurs with high fever, headache, nausea, and vomiting may be serious. Ask a doctor right away.

咽痛警告：加重或是持续的咽痛，或咽痛导致高烧，头痛，呕吐就是严重的情况，立即咨询医生。

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Women should report possible signs of preeclampsia, such as persistent or severe headache, visual changes, right upper quadrant or epigastric pain, sudden large weight gain, or facial edema.

孕妇应诉说先兆子痫的可能表现，如持续或严重的头痛，视力改变，右上腹或心口痛，突然体重大幅度增加，或颜面浮肿。

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Persistent bacteremia often leads to severe sepsis or overwhelming septic shock.

持续性的菌血症经常导致严重的败血症，甚至恶化为败血性休克。

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At the extreme end of the scale, the consequences of head injury are death, persistent vegetative state or severe physical and mental disablement.

BBC: Therapy

Older children and adults who have whooping cough often appear to have a bad cold or persistent cough that can be so severe that it causes vomiting.

CNN: Can breast-feeding prevent whooping cough?