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.
Takeshi Arashiro, Keiichi Furukawa, Akira Nakamura. COVID-19 in 2 Persons with Mild Upper Respiratory Tract Symptoms on a Cruise Ship, Japan. Emerging infectious diseases. 2020 Jun;26(6):1345-1348
PMID: 32118533
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