[Notdumb]

Doctors will always do preliminary checks eg like listening to your lungs for congestion. However dis is not foolproof as sometimes the pneumonia is just at the early stages and can ony be detected through x-rays. You mum was lucky she went poly when her cough got serious, otherwise they just send home bcos no outward serious symptoms.

 Dis particular case her father jin unlucky, early lung infection dat probably was not be detected by stethoscope.
However I oso dun understand how he could die so suddenly when it wasn't so serious a few days earlier, unless the 1st doctor was incompetent and totally missed out on the signs or under orders to quickly discharge those with light symptoms. .

2 mths back I went NUH again for weak legs plus breathlessness. 
On the spot they took x ray and CT scan....then kena warded.