In fact, this kind of herpes can be spread even if the carrier has no visible fever blister.

事实上，就算这种病毒携带者没有明显的热病性疱疹症状，病毒也会被传播的。

youdao

If you have a low-grade fever that persists for three weeks or more, but have no other symptoms, your doctor may recommend a variety of tests to help find the cause.

如果你发烧温度不高持续三周，但没有其他症状，医生也许会建议你做些检测来帮助发现病因。

youdao

The patients with high fever after kidney transplantation who had no efficiency to antibiotic should be suspected tuberculosis even if the patients had negative examination results.

肾移植术后高热应用抗生素效果不佳者即使化验结果阴性也不能排除结核菌感染。

youdao

If you have nausea, vomiting, diarrhea, low grade or no fever, it may be this norovirus you are suffering from.

FORBES: Norovirus: The Bug That Is Presently Making So Many Of Us Sick