Hai im Dr.Subramanian
Welcome to Hcm
See pertusis is very rare nowadays due to the emergence of
vaccine. Even though if your baby is affected she should be fine as the disease is self limiting. Just forget the pertusis part, just to follow up during her vaccine shots.
Now the point of concern is her feeding and weight gain.
Ideally we docs calculate the milk requirement for a baby of this age as 150ml per kg per day.
As her weight is 4.8, requirement is atleast 600ml per day, i.e 50ml 2nd hourly.
Breast milk is the best milk.
Mother can improve her diet and take medications to improve
lactation.
Inorder to increase weight gain for the baby add 1ml of MCT oil to each feed.
Keep her wrapped well, because heat loss from her body may also manifest as poor weight gain.
Kangaroo mother care has to be followed for atleast 30mins a day
Take care of your baby well, she will be fine.