1.   Herpes is a contagious viral infection caused by the herpes simplex virus.

2.   Might your most excruciating personal trauma be a contagious infection that you caught from someone else?

3.   Cholera is a highly contagious bacterial infection of the small intestine, usually spread by contaminated water and food.

4.   Diphtheria is a contagious infection of the upper respiratory system that is spread by coughing and sneezing.

5.   Diphtheria is a contagious infection of the upper respiratory system, and can be spread by coughing and sneezing.

6.   Diphtheria is a contagious infection of the upper respiratory system or the skin, which in severe cases can result in heart damage or death.

7.   Diphtheria is a contagious infection of the upper respiratory system or the skin.

8.   Dozens of viruses can cause the highly contagious infection, whose symptoms include tearing, itchiness and swelling of the eyes.

9.   Diphtheria is a contagious infection of the upper respiratory system or the skin, transmitted by bacteria which produce a toxin that is carried in the bloodstream.

10.   Diphtheria, transmitted by bacteria, is a contagious infection of the upper respiratory system or the skin.