Acute laryngitis is most common and it's usually due to an upper respiratory tract infection, most often due to a virus.

急性喉炎是最常见的，通常由于上呼吸道感染，最常见病因为病毒感染。

Infections are usually mild with upper respiratory tract infection and acute bronchitis common, but it can cause pneumonia in approximately 5-10% of cases.

感染通常较轻，常见上呼吸道感染和急性支气管炎，但在大约 5-10% 的病例中可引起肺炎。

It mainly causes upper respiratory tract infections, and gets its rhino- name, meaning nose, because it commonly causes a runny nose, nasal congestion, and sneezing, as well as a sore throat and cough.

它主要引起上呼吸道感染，其中rhino-表示鼻子；它通常导致流鼻涕、鼻塞和打喷嚏，以及喉咙痛和咳嗽的症状。