PIV3 infection with a higher viral load was frequently found in PSPs
CoV ( OC43 , HKU1 ) infections with a higher viral load were mostly observed in asymptomatic PSPs progressing to alveolar or interstitial infiltration .
PIV3 infection with a higher viral load was frequently found in PSPs presenting with mild symptoms , progressing to pneumonia with radiographic evidence after surgery .
CoV ( OC43 , HKU1 ) infections with a higher viral load were mostly observed in asymptomatic PSPs progressing to alveolar or interstitial infiltration .