AIDS (Acquired Immune Deficiency Syndrome) is caused by a virus known as HIV (Human Immunodeficiency Virus). The FactsHIV infection has become a worldwide epidemic. According to the UN -18.2 million people were accessing treatment (June 2016)36.7 million people globally were living with HIV (end 2015)2.1 million people became newly infected with HIV (end 2015)Certain parts of the population are more at risk than others, such as- People who inject illicit drugs, Bisexual and gay menSex WorkersWomen(Since not all women are in a position to always insist using protection)Young people.How does one get infected?The virus is transmitted by the blood, semen, vaginal fluid, and breast milk of infected people. It is also found in the saliva, sweat, and tears, though not in high enough amounts to transmit the virus to another person. There have been no known cases of anyone catching HIV through kissing, sneezing, shaking hands, from toilet seats, or mosquito bites.HIV is more commonly transmitted through unprotected vaginal, anal, or oral sex. Though it is said that the risk of infection is lower with oral sex, it is still strongly advised to use protection during oral sex, such as a dental dam (a piece of latex to cover the vagina during oral sex) or a condom. HIV can also be passed on through perinatal infection, where mothers who have HIV are at risk of giving the disease to the baby during birth. The risk of perinatal infection can be controlled with advances in treatments. Breast-feeding by an infected mother can also transmit HIV.Symptoms and ComplicationsSymptoms of HIV infection appear 2 to 12 weeks after exposure. These symptoms usually include-Swollen lymph nodes: Lymph nodes can be the first ones to be affected in response to the inflammatory reaction of the immune system.Prolonged fatigue: HIV infection has been known to make your body lethargic. You may feel tired sooner than you usually do.Recurring fever: Fever is body’s first response to any infection. An infected person will experience flu-like symptoms sometime during the initial four weeks. Skin rashes: An infected person will notice red, brown, pink, or purplish blotches on or under the skin inside the mouth, nose, or eyelids.Night sweats: Many people suffering from the infection get night sweats which are not related to any temperature changeMuscle and joint painsRapid and unexplained weight lossPneumoniaDiarrheaExtreme HeadachesWhen the symptoms begin to appear, the person with HIV is highly contagious.The symptoms can go away in just a week or can be experienced for almost a month. The infected person may in fact feel fine again. However, the symptoms can also return from time to time. The symptoms of HIV are similar to symptoms of other diseases. The only way to know for sure whether you are HIV-positive is to be tested. After infection with HIV, it can take 3 months for antibodies to the virus to be detectable in the blood. On an average, it takes over 22 days for our body to develop these antibodies. The process is known as seroconversion. After seroconversion occurs, the virus is easily detectable by a blood test.After the initial symptoms go away, the body's immune system tries to control the virus. Our immune system can keep the virus in check for a long time, but it can never completely get rid of it. Many infected people feel fine for years before their immune system weakens and they finally develop AIDS. Despite widespread availability of HIV testing, only an estimated 51 percent of people with HIV know their statusWithout timely diagnosis or a proper treatment, about half of HIV-positive people develop AIDS within 10 years of getting infected. Some people can also develop AIDS within just a few years of infection. A select few cases (called long-term non-progressors), do not develop AIDS until much later. Many factors can affect the time frame to develop AIDS, including medications and the person's general health and lifestyle.Anyone can become infected with HIV. Fortunately, it can be prevented.The main ways to prevent HIV infection are:Unless you are in a mutually monogamous relationship (neither of you is having sex with anyone else), and you are sure neither of you is HIV-positive, make sure to use a condom every time you have sex. In some cases, couples where one partner is infected may decide to risk infection of the other partner, especially if they are trying to get pregnant. If this is the case, talk to your doctor. Your choice of sexual partner is also important, since condoms do sometimes break or leak. You may know that you practice safe sex and that you haven't used dirty needles, but you must also know that your sexual partners and all their other partners do the same. Sharing needles is very dangerous – it carries a high risk of getting HIV.People with other sexually transmitted infections (STIs) such as herpes are much more likely to contract HIV during sex, probably because of tiny breaks in their skin or vaginal lining. Keeping free of other STIs will help reduce your risk of HIV infection, but this alone will not protect you from infection. Which is why it is important to use condoms.Having HIV doesn’t mean you stop living a full & healthy life. With the right treatment & care, you can expect to live just as long as someone who doesn’t have HIV. There’s a lot you can do to take care of yourself and feel fitter, healthier & happier.