Medical history Male,88 years old,be in hospital with a cough and expectoration for 5 days,other symptoms including muscle pain,fatigue,weak,body ache,dizziness.White phlegm easy to cough,no fever,no chest pain,no hemoptysis(咯血)，etc. After hospitalization,muscle pain was more and more serious,with chest pain, without numbness of limb,no swelling of joints and skin rash. Pysical examination:muscle strength decrease,pathology (-) 浑身肌肉 6Medical history Male , 88 years old，be in hospital with a cough symptoms including muscle pain, fatigue, weak, body easy to cough, no fever, no chest pain, no hemoptysis( After hospitalization, muscle pain was more and more serious, with chest pain, without numbness of limb, no swelling of joints and skin rash. Pysical examination：muscle strength decrease cough and expectoration for 5 days, other , fatigue, weak, body ache, dizziness. White phlegm easy to cough, no fever, no chest pain, no hemoptysis(咯血), etc. 6 muscle pain was more and more serious, with chest pain, without numbness of limb, no swelling of joints and skin rash. muscle strength decrease，pathology（-）