In most cases, sore throats are caused by viruses, the same germs that cause the common cold and flu. To a lesser degree a sore throat can be caused by bacteria like in strep throat and tonsillitis.
Due to the fact that the germs that cause sore throats are contagious they can easily spread where there are several people present such as schools and work places.
Not all sore throats are caused by germs, they can also be cause by allergies, dryness, pollution and GERD to name a few.
Prevention
Although painful and bothersome, most sore throats go away without medical treatment. The best way to prevent sore throats is by hand washing. Other preventative measures would include not sharing eating or drinking utensils and avoiding close contact with people who are sick.
Disclaimer
The content in this page is not a substitute for professional medical advice. If you think you have a Sore Throat, please consult your doctor.