The hepatitis C virus usually spreads through blood. The most common way that people get hepatitis C is through injection drug use, including sharing needles or syringes -- not through sex. But it's possible to get hepatitis C through sex.
You're more likely to get hepatitis C through sex if you or your partner have HIV or another sexually transmitted disease, have rough sex, or have more than one sex partner.
To lower your chances of getting hepatitis C through sex, avoid sex acts that could...
In most cases, hepatitis B causes limited infection. Usually people manage to fight off the infection successfully within a few months, developing an immunity that lasts a lifetime (this means you won't get the infection again). Blood tests show evidence of this immunity, but no signs of active infection.
However, some people don't get rid of the infection. If you are infected with hepatitis B for more than six months, you are considered a carrier, even if you have no symptoms. This means that you can transmit the disease to others by having unprotected sex, exposing blood or open sores to another person, or sharing needles or syringes.
For unknown reasons, the infection eventually goes away in a small percentage of carriers. For others, the infection becomes chronic. Chronic hepatitis is an ongoing infection of the liver that can lead to cirrhosis and liver cancer. Cirrhosis, or hardening of the liver, causes liver tissue to scar and stop working.
If you are carrying the virus you should not donate blood, plasma, body organs, tissue, or sperm. Tell your doctor, dentist, and sex partner that you are a hepatitis B carrier.
How Common Is Hepatitis B?
According to the CDC, the number of people contracting hepatitis B has decreased from an average of 200,000 per year in the 1980s to 43,000 in 2007. The highest rate of infection occurs among those 20 to 49 years old.
Approximately 5% to 10% of adults and children older than age 5 with hepatitis B infection go on to develop chronic infection. These rates climb much higher for children younger than age 5 (25% to 50%) and even higher for infants infected at birth (90%).
Approximately 1.25 million people in the U.S. are carriers of the hepatitis B virus.