Causes of Colds Colds are primarily caused by viruses transmitted through respiratory droplets from coughing or sneezing, as well as through direct contact. Representative virus types include Influenza viruses and Rhinovirus, each with various transmission routes. 1.
Influenza Virus (Flu) 1.1. Influenza A Type Characteristics: The most infectious type causing major flu outbreaks.
Infectious Anim.....
