Pre-exposure prophylaxis (PrEP) is a course of prescribed medications that people who are at risk of human immunodeficiency virus (HIV) may take to prevent infection. This medication is administered to individuals who have tested negative for HIV but are at a high risk of HIV infection. Read more: Should I Take PrEP for HIV? Article
Multimedia: Slideshows, Images & Quizzes
-
12 Preventable STDs: Pictures, Symptoms, Diagnosis, Treatment
Sexually transmitted infections like chlamydia and genital herpes are common STDs. Think you might have an STD? You’re not alone....
-
Genital Herpes: Causes, Treatment, and Prevention
What's going on down there? WebMD shows you pictures of genital herpes symptoms and treatments -- and how to avoid getting the...
-
Hepatitis C, Hep B, Hep A: Symptoms, Causes, Treatment
Hepatitis C, B, and A are viruses that cause liver inflammation. Hepatitis B vaccines and hepatitis A vaccines are available....
-
What Is Viral Hepatitis? How You Catch Hepatitis A, B, and C
Hepatitis C virus and hepatitis B can make an infected person very sick and they are risk factors for liver cancer, liver...
-
Hepatitis C (Hep C): Symptoms, Treatments, Antivirals
What is hepatitis C (Hep C, HVC)? Learn about hepatitis C symptoms, how you get Hep C, contagiousness, and treatment for...
-
A Timeline of the HIV/AIDS Pandemic
Get a historical overview of the HIV/AIDS pandemic from human contraction to the present through this slideshow of pictures.
-
Sexual Health: Safe Sex Mistakes to Avoid
Everyone makes mistakes. But when it comes to sex, they can be costly. WebMD explores common safe sex slip-ups.
-
Hepatitis A Quiz: Test Your Medical IQ
How many types of hepatitis are there, and what is different about hepatitis A? Take this quiz to find out!
-
Hepatitis C Quiz: What is Hepatitis C?
How many Americans have hepatitis C? Take this quiz to learn the facts about this chronic disease.
-
HIV & AIDS Quiz: HIV Testing & Symptoms
Now, more than ever, you should know about HIV/AIDS, especially its causes, symptoms treatments, and complications. Take the...
-
What Are HIV & AIDS? Symptoms, Treatment, and Prevention
HIV, or human immunodeficiency virus, causes acquired immunodeficiency syndrome, or AIDS. Learn about HIV symptoms, HIV test, HIV...
-
Genital Herpes Quiz: What is Genital Herpes?
What is genital herpes? Learn the causes, symptoms in men and women, and treatments for this common sexually transmitted skin...

SLIDESHOW
A Timeline of the HIV/AIDS Pandemic See SlideshowRelated Disease Conditions
-
STDs in Men
Symptoms of sexually transmitted diseases (STDs) in men include painful urination, bumps or sores on the penis, and penile discharge and itching. Learn about the most common STDs in men.
-
HIV Early Signs and Stages
HIV (human immunodeficiency virus) weakens your immune system. Some people with HIV don’t have any symptoms, but those that do may experience mononucleosis-like or flu-like symptoms. There are 3 stages of HIV.
-
Genital Warts (HPV) Infection in Women
Genital warts is a sexually transmitted infection (STI) caused by the human papillomavirus (HPV). Warts look like raised, flesh-colored lumps. Learn about symptoms, transmission, and treatment.
-
Should I Be Worried About Pregnancy if I Used a Condom?
Condoms are a popular method of birth control. If used correctly, there's about a 2 percent risk of becoming pregnant while using a condom, but it's a good idea to use another method of birth control along with it. Condoms are probably the most effective means for preventing human immunodeficiency virus (HIV) and other sexually transmitted infections (STIs), as long as they are used correctly during sex.
-
Gonorrhea In Women
Gonorrhea is a bacterial infection transmitted during sexual contact. In women, symptoms include a yellow vaginal discharge, burning or frequent urination, and redness, swelling, burning, and itching of the vaginal area. Gonorrhea can be treated with injectable (penicillin) or oral medications.
-
Sexually Transmitted Diseases (STDs)
Common sexually transmitted diseases (STDs) in women include gonorrhea, chlamydia, genital herpes, and HPV infection (genital warts). Learn about types, symptoms, and treatment.
-
What Do Herpes Sores Look Like at Different Stages?
Herpes simplex virus 1 (HSV-1) and simplex virus 2 (HSV-2) are the two types of herpes virus and will look different as they develop during five stages.
-
What Is Genital Herpes in Women?
Genital herpes is a sexually transmitted disease (STD) caused by the herpes simplex virus (HSV). Symptoms of genital herpes include painful blisters and often fever, body aches, and swollen lymph nodes for the first outbreak. Genital herpes is diagnosed with lab tests to test for the presence of the virus. Treatment for genital herpes includes antiviral medications to shorten the duration of the outbreak or reduce the risk of future outbreaks. There is no cure for genital herpes. Condoms may help prevent the spread of genital herpes.
-
What Are the Top 10 STDs?
According to the American Social Health Organization, each year one out of four teens in the United States develops a sexually transmitted disease (STD). Half of all sexually active young adults get an STD by the age of 25 years.
-
Hepatitis (Viral Hepatitis A, B, C, D, E, G)
Hepatitis is most often viral, due to infection with one of the hepatitis viruses (A, B, C, D, E, F (not confirmed), and G) or another virus (such as those that cause infectious mononucleosis, cytomegalovirus disease). The main nonviral causes of hepatitis are alcohol and drugs. Many patients infected with hepatitis A, B, and C have few or no symptoms of illness. For those who do develop symptoms of viral hepatitis, the most common are flu-like symptoms including: loss of appetite, nausea, vomiting, fever, weakness, tiredness, and aching in the abdomen. Treatment of viral hepatitis is dependent on the type of hepatitis.
-
HPV (Human Papillomavirus) Infection
HPV or human papillomavirus is a group of viruses that infect human mucous membranes and skin. HPV is highly contagious. Learn about symptoms, diagnosis, and vaccines.
-
How Do You Know if a Guy Has HIV?
Most of the signs and symptoms of an HIV infection are the same for both men and women. However, a few symptoms are specific to men, such as low sex drive, sores on the penis and pain during urination.
-
How Long Does It Take To Treat and Cure Syphilis?
Learn what medical treatments can help you treat syphilis and how long it takes to treat the infection to speed up your recovery.
-
Are Cold Sores the Same as Herpes?
What is the difference between cold sores and herpes? Cold sores are painful, unsightly sores that usually pop up around your mouth. Certain medications, home care and alternative therapies may help you get rid of cold sores fast.
-
Is Chlamydia Contagious?
Chlamydia is a sexually transmitted disease (STD) that is contagious. Chlaymida is spread through sexual contact. (You cannot get chlamyidia from kissing or sharing utensils or drinks.) Chlamydia is the most common STD in the U.S. The incubation period for chlamydia ranges from days to months, and the contagious period ends seven days after patients begin treatment. Chlamydia signs and symptoms may include painful urination, rectal irritation (proctitis), eye infections, and infertility. Women can also develop chronic pelvic pain, salpingitis, and endometritis.
-
How Does a Man Know if He Has HPV?
What is HPV, and what does it look like in men? Learn how to recognize HPV, when to see your doctor for HPV, and how to prevent and treat HPV in men.
-
Can a Woman Give a Man HPV?
Human papillomavirus (HPV) is a type of virus that is different from human immunodeficiency virus (HIV) and herpes virus (HSV). It is the most common cause of sexually transmitted disease (STD) in the United States. Yes, human papillomavirus (HPV) can be transmitted from a woman to man and vice versa.
-
Is Hepatitis Contagious?
Hepatitis means "inflammation of the liver," and there are several different types of such as A, B, C, D, and E. Some types of hepatitis are contagious and some types are not. Hepatitis symptoms vary upon the type of disease; however, the following symptoms may develop in someone with hepatitis: fatigue, nausea and vomiting, abdominal pain and discomfort, jaundice (yellowing of the skin and whites of the eyes), and loss of appetite. Treatment for hepatitis depends upon the cause. Some types of hepatitis have a vaccine to prevent spread of disease such as hepatitis A and B.
-
How Long Does It Take for Gonorrhea To Show up in Males?
What is gonorrhea and how do you know if you have it? Learn the signs of gonorrhea and what to do if you're dating someone who has it.
-
Can Chlamydia Go Away On Its Own?
It is highly unlikely for chlamydia to go away on its own.
-
Hepatitis B (HBV, Hep B)
The hepatitis B virus (HBV, hep B) is a unique, coated DNA virus belonging to the Hepadnaviridae family of viruses. The course of the virus is determined primarily by the age at which the infection is acquired and the interaction between the virus and the body's immune system. Successful treatment is associated with a reduction in liver injury and fibrosis (scarring), a decreased likelihood of developing cirrhosis and its complications, including liver cancer, and a prolonged survival.
-
Chlamydia
Chlamydia is the most common sexually transmitted disease in the U.S. Signs and symptoms of chlamydia, a bacterial infection, include vaginal discharge, abdominal pain, burning with urination, blood in the urine, and feelings of urinary urgency and frequency. Untreated chlamydia can cause pelvic inflammatory disease (PID), increased risk of ectopic pregnancy, and infertility. Chlamydia is diagnosed with a culture or by identification of the genetic material of the bacteria. Treatment of chlamydia consists of a course of antibiotics.
-
What Triggers Herpes?
Once a person is infected with herpes, the virus may stay dormant or quiet within the nerves. It is not known what exactly may trigger the symptoms.
-
What Are the Four Stages of HIV?
The World Health Organization (WHO) classifies human immunodeficiency virus (HIV) into four stages. Stage 1 (HIV infection): The CD4+ cell count is at least 500 cells per microliter. Stage 2 (HIV infection): The CD4+ cell count is 350 to 499. Stage 3 (advanced HIV disease or AHD): The CD4+ cell count is 200 to 349. Stage 4 (Acquired immunodeficiency syndrome [AIDS]): The CD4+ cell count is less than 200.
-
Can I Get Any STDs Through Clothing?
Most sexually transmitted diseases (STDs) cannot be transmitted through clothing. Some such as pubic lice, scabies and molluscum contagiosum can be transmitted by sharing clothes with an infected person.
-
How Long Does It Take to See Signs of HIV?
The signs and symptoms of HIV may first appear within two to four weeks of infection. The stage in which the symptoms appear is called the stage of acute HIV infection. The symptoms appear due to the resistance or fight of the immune system against HIV. Early diagnosis and treatment of HIV gets the best results.
-
Can Genital Warts Be Mistaken for Herpes?
What is the Difference between genital warts and herpes, and, can genital warts be mistaken for herpes?
-
What’s Worse, Hepatitis A, B, or C?
Because there is no vaccination available against hepatitis C, hepatitis C is often considered worse than hepatitis A or B.
-
How Long Does it Take for Gonorrhea to Show Up in Females?
What is gonorrhea and what are the symptoms of it? Learn the signs of gonorrhea and what to do if you have it.
-
What Does Herpes Look Like? Types and Treatment
Herpes is a skin infection caused by herpes simplex virus (HSV). It results in the formation of painful blisters or sores on the skin, typically around the mouth or genitals.
-
Can I Get HIV From Surfaces?
Studies proved that HIV cannot be transmitted through surfaces such as toilet seats, chairs, doorknobs, drinking glasses and bedsheets. The virus cannot survive outside a human host; hence, transmission through air, water (swimming pools), insect bite or casual contacts such as handshake, hug or touch is not possible.
-
Human Immunodeficiency Virus (HIV)
HIV (human immunodeficiency virus) infection left untreated causes AIDS (acquired immunodeficiency syndrome). Still incurable, AIDS describes immune system collapse that opens the way for opportunistic infections and cancers to kill the patient. Early symptoms and signs of HIV infection include flu-like symptoms and fungal infections, but some people may not show any symptoms for years. Highly active antiretroviral therapy (ART) is the standard treatment for HIV infection. These combination drug regimens have made HIV much less deadly, but a cure or vaccine for the pandemic remains out of reach. HIV is usually transmitted through sexual contact or sharing IV drug needles, but can also infect someone through contact with infected blood. Sexual abstinence, safe sex practices, quitting IV drugs (or at least using clean needles), and proper safety equipment by clinicians and first responders can drastically reduce transmission rates for HIV/AIDS.
-
Can I Get STDs Through Casual Contact Like Hugging or Touching?
Most sexually transmitted diseases (STDs) or sexually transmitted infections (STIs) do not spread through casual contact such as hugging, touching or kissing, although there are exceptions.
-
Hepatitis A (HAV, Hep A)
Hepatitis means inflammation of the liver. Hepatitis A (HAV, Hep A) is one type of liver disease caused by a virus. Since hepatitis A is a virus, it can pass from person to person from eating or drinking contaminated food or coming into contact with contaminated materials containing the virus. Symptoms of hepatitis A include stomach pain, diarrhea, dark yellow urine, jaundice, and more. There is a vaccine to prevent contracting hepatitis A.
-
STDs: Common Symptoms
Sexually transmitted diseases (STDs) are infections that are transmitted during vaginal, anal, and oral sex. Symptoms may include genital sores, unusual discharge, pain during sex or urination, and itching or discomfort.
-
Is Hepatitis C Contagious?
Hepatitis C or hep C causes acute and chronic liver disease. Hep C is a form of liver disease with symptoms like fatigue, jaundice, nausea and vomiting, anorexia, and abdominal discomfort. Hepatitis C is a contagious viral infection caused by persons sharing drug needles, surgical instruments that have not been properly sanitized, and organ transplantation.
-
Can Herpes Simplex Be Cured?
The herpes simplex virus causes sores and blisters around the mouth or genitals. Learn the signs of herpes, what causes it, how doctors diagnose it, and what you can do to treat it.
-
How Long Does It Take to Notice Signs of HIV?
HIV (human immunodeficiency virus) is a virus that attacks and damages the cells of the immune system in the body. If left untreated, HIV can lead to the AIDS (acquired immunodeficiency syndrome) disease. AIDS is the final stage of HIV infection which occurs when the body’s immune system is severely damaged because of the virus and unusual infections result. Untreated, HIV infection has a mortality of 90%.
-
How Effective Is PEP?
Post-exposure prophylaxis (PEP) involves taking anti-HIV medications immediately after any potential exposure to HIV (human immunodeficiency virus) to prevent HIV infection (acquired immune deficiency syndrome or AIDS).
-
Is Hepatitis B Contagious?
Hepatitis B is a type of liver infection. Hepatitis B is spread through person-to-person contact or through personal items like razors, toothbrushes, etc. Symptoms of hepatitis B include fever, yellowish skin (jaundice), dark urine, fatigue, nausea, and vomiting. There is no drug to cure hepatitis B; however, there is a hepatitis B vaccine available.
-
Genital Herpes and Cold Sores: 10 Myths and Facts
Genital herpes and cold sores (oral herpes) are the names given to two types of infection caused by the two types of herpes simplex virus (HSV): HSV-1 and HSV-2.
-
Hepatitis A and B Vaccinations
Hepatitis A and hepatitis B are the two most commnon viruses that infect the liver. Hepatitis A and Hepatitis B can be prevented and treated with immunizations (vaccinations) such as Havrix, Vaqta, Twinrix, Comvax, Pediarix, and hepatitis b immune globulin (HBIG).
-
What Happens If Syphilis Is Left Untreated?
Untreated syphilis can lead to permanent damage to multiple body systems such as the brain, heart, and eyes and result in life-threatening complications.
-
How Long Does It Take to Show Signs of Chlamydia?
Chlamydia is a sexually transmitted infection caused by the bacteria chlamydia trachomatis. You can get it on your penis, vagina, anus, or in your throat. In rare cases, chlamydia can also infect the eyes.
-
How Bad Does It Hurt to Pee With Chlamydia?
Chlamydia is a common bacterial sexually transmitted infection (STI) caused by the bacterium Chlamydia trachomatis and can be a cause painful urination.
-
What Is Usually the First Sign of HIV?
Human immunodeficiency virus (HIV) attacks the cells of the immune system, leading to AIDS and death if left untreated. The first signs of the human immunodeficiency virus infection are flu-like symptoms, which mainly start around two to four weeks after getting HIV. This stage is known as acute HIV infection.
-
5 Things You Should Know About Herpes
Most people who have genital herpes have no symptoms or have very mild symptoms. Patients may not notice mild symptoms or may mistake them for another skin condition, such as a pimple or ingrown hair.
-
Does HIV Have a Permanent Cure?
As of now, there is no permanent HIV cure, but antiretroviral treatment can effectively control HIV.
-
Hepatitis C Cure (Symptoms, Transmission, Treatments, and Cost)
Hepatitis is inflammation of the liver. There are a variety of toxins, diseases, illicit drugs, medications, bacterial and viral infections, and heavy alcohol use can case inflammation of the liver. Hepatitis C viral infection (HCV) is one type of hepatitis. According to the CDC, in 2014 there were an estimated 30,500 cases of acute hepatitis C infections in the US. An estimated 2.7-3.9 million people in the US have chronic hepatitis C. The virus is spread from person-to-person via blood-to-blood contact. Symptoms of HCV infection include joint pain, jaundice, dark urine, nausea, fatigue, fever, loss of appetites, clay colored stool. Hepatitis C can be cured with medications in most people. There is no vaccine against the hepatitis C virus.
-
Is Hepatitis A Contagious?
Hepatitis means inflammation of the liver. Hepatitis A is one type of hepatitis. Hepatitis is transmitted through person to person contact, contaminated ice, vegetables, fruits, and untreated water. Hepatitis A can be prevented by the hepatitis A vaccine. Symptoms of hepatitis A may include nausea and/or vomiting, fever, loss of appetite, abdominal pain, dark urine, clay-colored stools, jaundice (yellowish color to skin and/or eyes, or joint pain.
-
HIV/AIDS Testing: Diagnosis and Monitoring
HIV/AIDS diagnosis and monitoring have come a long way from the days when a diagnosis was a death sentence. Crucial parts of the effective treatment regimens developed in the last 40 years are consistent monitoring of the viral load (the amount of virus in the blood), and the immune cell count, which function as biological markers of the disease’s progression. Doctors also must test for drug resistance.
-
What Causes Human Papillomavirus Infection (HPV)?
Human papillomavirus (HPV) is the most common viral infection that is transmitted through sexual activity. People can get an HPV infection by having vaginal, anal or oral sex with someone infected with the virus. HPV infections often resolve without treatment and do not cause any health problems. A persistent HPV infection though may lead to warts, cancer of the mouth and throat, and cervical cancer.
-
Can You Get Rid of HPV Once You Have It?
Human papillomavirus (HPV) is a type of virus that is different from human immunodeficiency virus (HIV) and herpes virus (HSV). It is the most common cause of sexually transmitted diseases (STDs) in the United States. In most cases, human papillomavirus (HPV) infections can go away on their own.
-
Genital Warts in Men (HPV)
The HPV virus (genital warts) in men can cause health problems. Genital warts are confined primarily to the moist skin of the genitals or around the anus. Genital warts are caused by the human papillomaviruses (HPVs), which are transmitted through sexual contact.
-
HIV/AIDS Infection Transmission and Prevention
HIV (human immunodeficiency virus) is spread through contact with genital fluids or blood of an infected person. The spread of HIV can occur when these secretions come in contact with tissues such as those lining the vagina, anal area, mouth, eyes (the mucus membranes), or with a break in the skin, such as from a cut or puncture by a needle.
-
Can I Get HIV From Casual Contact Like Hugging or Touching?
Human immunodeficiency virus (HIV) cannot spread through casual contact such as hugging or touching. HIV does not spread through urine, saliva, tears, sweat, kissing (closed mouth or social kissing), shaking hands, sharing utensils, sharing food or drinks, sharing clothes, or from toilet seats. HIV is spread through bodily fluids from a person with HIV.
-
When Should I Test for HIV?
The CDC recommends everyone between 13 and 64 should get tested for human immunodeficiency virus (HIV) at least once in their lifetime. If you've had unprotected sex with a new or multiple partners, pregnant women, intravenous drug users, are being treated for a STD, have tuberculosis, or hepatitis, are also reasons to get screened and tested.
-
Eight Myths About Chlamydia
So much wrong information about sexually transmitted diseases (STDs) gets passed around that it’s no surprise the diseases do too.
-
How Do You Get Syphilis and What Does It Look Like?
What is syphilis, and how do you get it? Syphilis is a highly contagious disease. Learn about the symptoms, treatment, and prevention of this sexually transmitted infection,
-
What Are the Symptoms and Signs of Herpes?
Herpes is a type of infection caused by the herpes simplex virus (HSV). It causes sores or blisters to form in or around the mouth or genitals.
-
HPV in Men: Symptoms, Causes, Tests, Treatment
Human papillomavirus (HPV) is a sexually transmitted virus that infects half of the young adults aged 15-24 years each year in the United States. In general, genital (penis, scrotum) HPV infection has increased significantly over the past decades. HPV infection is caused when the HPV gets transmitted from an infected person to a healthy person through oral, vaginal, or anal sex.
-
How Long Can You Live With Hepatitis A?
Acute illness of hepatitis A typically subsides within two months; however, it may last for up to six months in more severe cases.
-
What Does the HPV Vaccine Prevent?
There are several vaccines that prevent infection with HPV. They also protect against other cancers that HPV causes including cancer of the vagina, vulva, penis, throat, and anus.
-
Is HIV PEP (Post-Exposure Prophylaxis) Recommended for Me?
Post-exposure prophylaxis (PEP) refers to a short course of antiretroviral medications taken soon after a possible exposure to HIV to prevent the virus from infecting your body.
-
How Serious Is Chlamydia?
Untreated chlamydia disease, however, can cause serious health problems with both short- and long-term complications.
-
What Does Chlamydia Do to a Woman?
Chlamydia is a sexually transmitted disease (STD) that poses risks for both men and women. Untreated chlamydia in women may cause pelvic inflammatory disease (PID) or may harm an unborn baby.
-
What Are STDs?
Sexually transmitted diseases (STDs) are diseases that a person can get by having sex with someone who has an STD.
-
What Are the First Signs of HIV?
Initial signs and symptoms of HIV generally appear within two to four weeks of infection. Fever, body aches, muscle aches, chills, sore throat, headache, rash, night sweats, fatigue, mouth ulcers, and swollen lymph nodes (glands) are possible first signs and symptoms.
-
What Is the Difference Between HIV and AIDS?
HIV is a virus that causes immunosuppression. The difference between HIV and AIDS is that HIV is the first stage of the viral illness while AIDS represents the progression of the illness.
-
What Are the Symptoms and Signs of Syphilis?
Syphilis is a bacterial infection that spreads through sexual contact. It is caused by the spirochete bacterium, Treponema pallidum. The first sign of syphilis is most commonly a painless sore, called a chancre, which develops where the bacteria enters the body.
-
How Do You Get Syphilis?
Syphilis is a sexually transmitted disease (STD) caused by the bacterium Treponema pallidum. Transmission can occur through contact with a chancre or syphilitic sore, blood transfusions, or from mother to child during pregnancy or birth.
-
What Comes First HIV or AIDS?
HIV is an infectious that suppresses the immune system. Acquired Immunodeficiency Syndrome (AIDS) is the most severe stage of the infection caused by the Human Immunodeficiency Virus (HIV).
Treatment & Diagnosis
Prevention & Wellness
From 
Resources for Staying Well
Health Solutions From Our Sponsors
Subscribe to MedicineNet's General Health Newsletter
By clicking Submit, I agree to the MedicineNet's Terms & Conditions & Privacy Policy and understand that I may opt out of MedicineNet's subscriptions at any time.