Symptoms of a cold in infants generally include less energy and spirit than usual and varying degrees of reduced appetite. Depending on the type of cold, other symptoms may differ. If the cold is caused by a respiratory virus infection, common symptoms include nasal congestion, runny nose, sneezing, coughing, phlegm, and sometimes wheezing. Severe cases may experience shortness of breath. If it's a cold caused by a gastrointestinal virus infection, typical symptoms include nausea, vomiting, abdominal pain, bloating, and diarrhea. The severity of the cold and the source of the infection can also lead to varying degrees of fever.