If the cough is that serious, pls see a doctor first to treat the cause of the cough. that is the most important thing to do

Avoid contact with adults with cough and catarrh and keep them warm - no twice daily or Thrice daily unnecessary baths..No cooking indoors or frying oil etc where baby is or use of fleet (insecticide); take all immunisation and keep breastfeeding exclusively....These are some ways to prevent all these cough and catarrh all the time