Colds are easily transmitted from person
to person by infected droplets of moisture floating in the air or by
contaminated dust, it is a contagious disease. These colds viruses enter our body through our mouth and eyes.
It is an upper respiratory tract infection caused by one of about 200
different viruses affecting our eyes, ears, nose and throat. When we
come into contact with people who are suffering from colds, the
viruses will invade the cells in our bodies and cause symptoms of a
cold. The only way to catch colds is to come in contact with the
colds virus, either from the hands of an infected person or from a
kiss or sneeze. However, not everyone infected with the colds virus
will fall sick. If you get enough rest and exercise regularly by
keeping stress at a manageable level, this can possibly help your
immune system to overcome the virus.
Colds symptoms develop from one to two
days after exposure. A person who harbors the infection can
transmit it to others a few hours before his own symptoms begin and
for as long as five days after symptoms have appeared. Exposure
to cold or to wind, extreme fatigue, loss of sleep, or other causes of
reduced vitality seem to make a person more susceptible.
Since the common cold may be caused by such a large number of
different viruses, protection by immunization is practically
impossible. There is no effective means of prevention except to
maintain good general health and vigor and to avoid excesses of
fatigue and exposure. Symptoms of the common cold usually begin
with a roughness or irritation in the throat. This is followed
quickly by sneezing and running nose, and symptoms such as mild
chilliness and aching in various muscles and tissues.
Among possible complications are
infection of the middle ear (otitis media), infection of the nasal
sinuses, bronchitis, and even pneumonia. The irritated tissues
of the upper respiratory tract become vulnerable to invasion by common
bacteria always present in the air passages, and these cause the