What do you really know about HIV and AIDS? How sure are you that what you know is correct or complete, and how much do you think it matters that you know about HIV and AIDS at all? Check out our extensive FAQ and get informed.

I have genital herpes. Those people you see in the Valtrex commercials, running down a beach with five beautiful women chasing after them? Totally me.

Chlamydia is the most common bacterial infection (STI) in the United States, with about 3 million new cases reported annually. Chlamydia ("cla-mid-ee-ah") is so common in young women that, by age 30, 50% of sexually active women have evidence that they have had chlamydia at some time during their lives.

Vaginal discharge and secretions are a normal, healthy part of your reproductive system. The vagina -- which is not the whole of your genitals, that's called the vulva, but the flexible tube behind the vaginal opening and inside the body -- is a passageway between the outside of the body and the internal reproductive system. The pH balance of the vagina is acidic, with "good" bacteria, by design, which helps keep infections away. Vaginal secretions are how the vagina cleanses and regulates itself -- how amazing is that? -- in the same sort of way that saliva helps keep your mouth clean and healthy.

A vaccine -- Gardasil -- is available to help prevent the spread of some types of HPV. The Centers for Disease Control report that clinical trials in over 11,000 young women have shown the vaccine to be 100% effective for young women in preventing cervical precancers caused by the targeted HPV types, and nearly 100% effective in preventing vulvar and vaginal precancers and genital warts understood to be caused by the targeted HPV types.

There are instances in which condom use alone - or the use of dental dams and gloves -- cannot offer the level of STI protection they can in other instances, with STIs which are transmitted not via fluid exchange, but by skin-to-skin contact: namely two of the most common STIs, HPV and Herpes.

Is it possible to have more than one STI at a time? When you and your partner both have HIV you don't need to use a condom right? How can you tell someone had an STI? Scarleteen’s taking the time to debunk some of the most common misconceptions surrounding Sexually Transmitted Infections in one handy place.

Bacterial vaginosis (BV) is the most common cause of vaginitis symptoms among women of childbearing age (15-45). However, half the women who meet clinical criteria for BV have no symptoms.

As many as one in ten Americans have HPV, and some studies show that at least one-third of all sexually active young adults have genital HPV infections. It is often stated that more than half of all college-age women wil become infected with HPV during their college career.

Whether you are with a new partner, or are already in a sexual relationship, getting a full STD/STI screening can give you peace of mind and ensure your physical well-being as well as your partners.

About one in five people in the United States over age 12 -- approximately 45 million individuals -- are infected with HSV-II, the virus that causes genital herpes. Around 50 - 80% of the adult population has oral herpes, which most people contracted through casual contact in childhood.

Pubic lice are often spread through sexual contact, though genital contact or sexual intercourse is not necessary for transmission. In a few cases, pubic lice have been spread through contact with bed linens, towels, or clothes because lice can live for 24 hours off a human body.

HIV is a virus that destroys the immune system and thus weakens the body's ability to fight disease and infection, even common infections like flus and colds. HIV usually progresses to AIDS. This makes HIV the most dangerous sexually transmitted infection today. It is the fifth leading cause of death for the young under 40 in the United States. At this time, no one has been cured of HIV or AIDS.

Itching like nobody's business down south? Have a curdled discharge? Candida Albicans may be the hoodlum to blame.

One Scarleteen reader's story of having a friend with AIDS.

For the past 13 years, people all over the world have used this day to educate, learn, remember and think about and put the focus of the global community for just one day on HIV and AIDS. Saturday, December 1st is no exception.

Trichomoniasis is one of the most common sexually transmitted diseases, mainly affecting 16-to-35-year old females.

Syphilis has been called "the great imitator" because many of its signs look like other diseases. It is also difficult to know if someone has syphilis because a person might not have any symptoms at all.

This disease has bothered humans for thousands of years, but it seems to come and go in unexplainable cycles. Scabies used to be very rare in America, but now it is coming back again.

"Pelvic inflammatory disease" is shorthand for any serious bacterial infection of the reproductive organs that are housed in the pelvis: the uterus, uterine lining, fallopian tubes, and/or ovaries. These infections usually start in the vagina and, when left untreated, can progressively infect other reproductive organs. 20% of PID cases are found in teens, who often are afraid or unable to get reproductive health care. PID can result in permanent infertility and chronic pain.

In the United States, approximately 75% of all reported gonorrhea is found in people age 15 to 29.

Every year, CMV causes permanent disabilities, hearing loss and mental retardation for as many as 7,000 infants.