Table 1 Etiology of ground-glass opacities in study groups

Viral pneumonia

36

 Influenza A (H1N1)

15

 SARS

4

 MERS

2

 RSV

3

 HSV

4

 Adenovirus

2

 Rhinovirus

6

Atypical bacterial pneumonias

8

 Mycoplasma

4

 Chlamydia

3

 Klebsiella

1

PJP

6

Interstitial pneumonias

15

 NSIP

6

 DIP

3

 COP

6

HP

8

EP

4

DAH

6

Drug-induced lung injury

7

Pulmonary edema (cardiogenic and non-cardiogenic)

10