1 By viruses
2 Because there are hundred types of viruses that can cause cold
3 There are three: A (often the cause of flu epidemics), B and C
4 Anyone can catch a cold or flu
5 Winter
6 A cold causes a stuffy or runny nose, sneezing, sore throat, cough, mild fever and tiredness
7 It lasts from two to four days.
8 Flu is more severe with a high fever (usually 39oC or above), chills, headache, intense muscle pains, exhaustion, loss of appetites, cough and sometimes a blocked nose and sore throat.
9 It may last a week or more
10 Decongestant rubs or vaporizes