Blood is the most dangerous among risks to contagion of a sexually transmitted disease. If you come into contact with the blood of an infected person, the higher the risk of contracting hepatitis B, C and HIV. In many cases it happens that people don’t realize that had entered into contact with the infected blood, because they can sometimes be found in the body of small wounds that were not given importance.
Unlike hepatitis B and C and HIV, in very rare cases, also syphilis can be transmitted through contaminated blood.
If you know you have touched blood of another person, you should contact your doctor or a specialized center for sexually transmitted diseases to make a check.