The common cold is a very common clinical disease, caused by a viral infection that is somewhat contagious. So, how is the common cold transmitted? On one hand, it can spread through the respiratory tract; for example, cold sufferers through sneezing, coughing, and other methods can produce droplets containing the cold virus. When these droplets are inhaled by healthy individuals, they can become infected. Additionally, if everyday items are contaminated by the cold virus, other people can come into contact with the virus by touching these items. If they do not wash their hands afterwards, they can also become infected with the cold virus through contact.