Changes

'''Sexually transmitted diseases''' (STDs) are illnesses transmitted by sexual contact. STDs comprise a large and diverse set of disease entities which include [[virus]]es, bacteria, protozoa, and arthropods.  Many of these diseases can cause great harm before symptoms are detected.  

'''Sexually transmitted diseases''' (STDs) are illnesses transmitted by sexual contact. STDs comprise a large and diverse set of disease entities which include [[virus]]es, bacteria, protozoa, and arthropods.  Many of these diseases can cause great harm before symptoms are detected.  

 

Many STDs cause infertility, making it impossible ever to have children.  A majority of teenagers who have sex are infected with an STD.<ref>4 out of 10 teenagers are sexually active; over half of this 40% (25% of all teenagers) have an STD.[http://host.madison.com/ct/news/local/health_med_fit/article_96d0ee57-e3dc-59d7-a5ec-e5cbc5b71ffc.html]</ref>

Most STDs cause infertility, making it impossible ever to have children.  A majority of teenagers who have sex are infected with an STD.<ref>4 out of 10 teenagers are sexually active; over half of this 40% (25% of all teenagers) have an STD.[http://host.madison.com/ct/news/local/health_med_fit/article_96d0ee57-e3dc-59d7-a5ec-e5cbc5b71ffc.html]</ref>