Rhinovirus is a type of virus that primarily causes the common cold. It belongs to the family of Picornaviridae and is known for its ability to spread easily through respiratory droplets when an infected person coughs or sneezes. Symptoms of a rhinovirus infection typically include a runny nose, sore throat, and cough. This virus thrives in cooler temperatures, which is why colds are more common in the fall and winter months. While rhinovirus infections are usually mild and self-limiting, they can sometimes lead to more serious respiratory issues, especially in individuals with weakened immune systems or pre-existing conditions like asthma.