My 6-month-old girl caught flu/cold since friday. she has running nose and cough. she has mucus in her nose and it's understandable. the part worries me is that i can hear mucus when she breathes. shall i be concerned about it?

Depends: Infants have narrow nasal passages compared to adults, and breathing often sounds noisy when there is a cold. As long as your baby is able to take bottles or nurse ok, is normally interactive, and chest movement seems normal with breathing, she should be fine. She may be more comfortable in a seated or somewhat upright position.

Probably not: Coarse breath sounds when breathing is unlabored is generally not a concern. The sounds from upper airway get transmitted to chest and make many parents fear pneumonia. At that age, significant lung disease usually causes marked feeding trouble. If feeding reasonably well and breathing unlabored, then the noise is not likely dangerous.

Needs to see M.D.: It appears that the baby has a viral infection. However, the gurgling sound during breathing is of concern. It can be from Bronchitis, Pneumonia, or Broncho spasm from allergy/ asthma. Please have her pediatrician check out as soon as you can and have it properly treated.