有报告不症状带菌者的情况，这些人没有疾病的临床症状但是能够感染其他人。
An asymptomatic carrier state has been reported, where individuals show no clinical signs of disease but are capable of infecting others.
肺部良性肿瘤一般不呈现临床症状，生长缓慢，病程长。
Pulmonary benign tumor generally does not show clinical symptoms, slow growth, long course.
主要临床表现为眼红痛和视力损害，伴或不伴全身症状。
Cardinal manifestations were ocular redness, pain and visual impairment with or without systemic symptoms.
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