Common cold in babies – Symptoms and causes – Mayo Clinic

A common cold is a viral infection of your baby’s nose and throat. Nasal congestion and a runny nose are the main indicators of a cold. Babies are especially susceptible to the common cold, in part because they’re often around other older children. Also, they have yet to develop immunity to many common infections.

https://www.mayoclinic.org/diseases-conditions/common-cold-in-babies/symptoms-causes/syc-20351651