1yr female infant came to hospital due to she has grunting noise when she awake 3day PTA
she has fever T38.0 c. Not have any URI , no cough , no rhinnorhea
at ER cyanosis O2sat 90 %,RR 56, nasal flaring, subcostal retraction
Lung : clear , equal , Heart : no murmur
Ext : no rash
when she sleep, she breath smoothly, no nasal flaring, no grunting
pls help me to diag her ...