What type of virus primarily causes the common cold?

The primary cause of the common cold is the rhinovirus. This group of viruses is responsible for a significant percentage of upper respiratory tract infections. Rhinoviruses can easily spread from person to person, predominantly through respiratory droplets or by direct contact with contaminated surfaces. They thrive in cooler temperatures, which is why colds are more common in the fall and winter months.

While other viruses, such as coronaviruses, influenza viruses, and respiratory syncytial viruses, can also cause respiratory illnesses, they are typically associated with more severe diseases or other specific syndromes. Coronaviruses are known to cause a range of illnesses, including severe respiratory infections like COVID-19, and the influenza virus is primarily responsible for the flu, characterized by fever and body aches. Respiratory syncytial virus (RSV) is a common cause of respiratory infections in infants and young children. In contrast, rhinoviruses are the leading culprits behind the typical cold symptoms in the general population.