Common cold  From Wikihealth Jump to: navigation, search Illu
nose nasal cavities.jpg Common colds are minor infections of the
respiratory tract caused by several types of viruses, mostly the
Rhinoviruses. Each year, a child can catch colds as much as
eight times, while adults can get about two to four cold
episodes. In the Philippines, common colds are common during
rainy days, and the colder months from December to February.
Over 200 types of viruses cause common colds. Among all these
viruses, rhinoviruses are said to cause about 10% to 40% of all
cases. Rhinoviruses thrive at 32.7 degrees Celsius (91 degrees
Fahrenheit), which is the temperature inside the human nose.
Coronaviruses account for about 20% to 30% of common colds,
mostly with short incubation periods. Other viruses that cause
colds are respiratory syncitial virus (RSV) , adenoviruses,
paramyxoviruses, coxsackieviruses, and orthomyxoviruses among
others.  Contrary to common belief, cold weather does not
directly cause colds, although some c