We collected the induced sputum from enrolled 1629 children <*> with no respiratory symptom prior to pediatric surgery between March 2017 and February 2019 .
We tested 16 different respiratory virus infections in post - surgery mild symptomatic PSP group and asymptomatic PSP group
We collected the induced sputum from enrolled 1629 children ( under 18 years of age ) with no respiratory symptom prior to pediatric surgery between March 2017 and February 2019 .
We tested 16 different respiratory virus infections in post - surgery mild symptomatic PSP group and asymptomatic PSP group using a quantitative real - time reverse transcriptase polymerase chain reaction ( qRT - PCR ) assay panel .