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较不常见的症状包括疲劳、呼吸道痰液（痰）、嗅觉丧失、气促、肌肉和关节痛、喉咙痛、头痛、发冷、呕吐、咯血、腹泻或发绀。据世界卫生组织称，约六分之一的患者会转为重症，并出现呼吸困难。
less common symptoms include fatigue, respiratory sputum production (phlegm), loss of the sense of smell, shortness of breath, muscle and joint pain, sore throat, headache, chills, vomiting, hemoptysis, diarrhea, or cyanosis.the who states that approximately one person in six becomes seriously ill and has difficulty breathing.
