The risk of catching an STD if not wearing a condom is roughly three or four times higher
than if a condom is used consistently and correctly.
This does NOT mean that condoms ever protect a person from getting an STD —
Condoms only "reduce the risk"– Condoms do NOT ELIMINATE the risk…
Of course, there is NO protection from STDs if using chemical contraceptives such as
The Pill, The Patch, The Shot, and so on…
[Morris BAP. How safe are safes? Efficacy and effectiveness of condoms in preventing STDs. Can Fam Physician. 1993;39:819-827]