What all will condoms protect agaist what all diseases do they help prevent.
Condoms greatly reduce the risk of transmitting or contracting nearly every sexually transmitted disease that we have a name for. The CDC has a complete write-up on the effectiveness of condoms on their web site:
http://www.cdc.gov/condomeffectiveness/latex.htm
condoms dont always protect things! it sometimes can prevent girls from pregnancy but not always! some protect from std's ! hope this advice works