Hi welcome to Health care magic..........
for 23 days is something very disturbing. Possibiity is 1)pertusis 2) pertusoid like infection 3) any congenital malformations.
For pertusis the treatment is azithromycin
, as per child s weight.
Pertusoid like infection is usually viral so no special treatment.
A chest CT can reveal if any congenital malformation causing cough.