You're more likely to catch a cold and to have more-severe colds if you're exposed to cigarette smoke. Exposure. If you're around many people, such as at school or on an airplane, you're likely to be exposed to viruses that cause colds. Complications. Acute ear infection (otitis media).
colds are not caused by exposure to severe weather.Colds are caused by viruses(病毒)harbored in the ...