We describe 2 cases of coronavirus disease in patients with mild upper respiratory symptoms. Both patients worked on a cruise ship quarantined off the coast of Japan. One patient had persistent, low-grade upper respiratory tract symptoms without fever. The other patient had rapid symptom cessation but persistent viral RNA detection.

中文翻译：

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日本游轮上 2 人患有轻度上呼吸道症状的 COVID-19。

我们描述了 2 例患有轻度上呼吸道症状的冠状病毒病患者。两名患者都在日本海岸隔离的游轮上工作。一名患者有持续的、低度的上呼吸道症状，没有发烧。另一名患者症状迅速停止，但病毒 RNA 检测持续存在。