HIV is a human immunodeficiency virus that destroys the immune system, the body's innate barrier system against pathogenic organisms and disease. This makes the virus particularly harmful to a key part of the immune system, namely the CD4 cells (T cells, white blood cells) that are crucial in protecting the body from infection. The virus then attacks these cells, enters them and usually begins to reproduce in them, as the infection later develops the ability of the human being to develop infectious diseases and in turn weakens the immune system's ability to fight them. Thus, the destruction of CD4 cells causes a gradual decline in the body's immune function. Without treatment, the body becomes increasingly vulnerable to disease-related infections and cancer. This condition is known as acquired immune deficiency syndrome (AIDS) which marks the final and extreme final stage of HIV infection as these immune cells are lost. HIV does not directly cause disease, but provides opportunities for opportunistic infections and other diseases that can result in death.
Mainly, this virus attacks through body fluids such as blood, semen, vaginal fluids, rectal fluids, and breast milk. Contact of these fluids with mucous membranes found in the genital areas, rectum, or urethra can lead to HIV infection. HIV can also be spread by sharing needles or other injection equipment and through mother-to-child transmission during pregnancy, delivery, or breastfeeding. HIV is not spread by hugging, shaking hands, or sharing food with an infected person. Unprotected sex, sharing needles, transfusion of contaminated blood are other means through which this virus can spread. The groups most at risk for HIV infection usually include people having unprotected sex with multiple partners, people using needles for drug injection, as well as people who have sex with HIV-positive individuals or people with unknown HIV status.
When a person is first infected with HIV, there may be an initial acute period with mild flu-like symptoms (i.e., acute retroviral syndrome, ARS, or primary HIV infection), which lasts for about two to four weeks after exposure. This initial presentation usually includes symptoms such as fever, swollen lymph nodes, sore throat, rash, muscle pain, and headache. However, not all individuals infected with HIV may report such symptoms; most of them may not even know that they have the infection. Within the first weeks after infection, there will be a period during which the virus replicates intensely and manages to spread throughout the organism. The immune system begins to generate its own responses, but even this is not enough to eliminate the virus. After this, the virus progresses to a stage identified as clinical latency, chronic HIV infection, or asymptomatic HIV. During this period the person may reproduce the virus at very low levels, but the person may not show any symptoms. It can last for many years, during which people with HIV may feel well and healthy, making it difficult for anyone to detect the infection without testing.
Left untreated, HIV grows rapidly in a person and gradually destroys CD4 cells, weakening the immune system. With a low number of CD4 cells, the body becomes prone to opportunistic infections as well as certain cancers. These infections and cancers are the ones that can take advantage of a weakened immune system to transform HIV into AIDS. AIDS is the last and most severe stage of infection with HIV. Here, the immune system is severely weakened, and the body becomes susceptible to several infections, cancers, and other health complications. People suffering from AIDS are at a higher risk of developing tuberculosis, pneumonia, fungal infections, and cancers such as Kaposi sarcoma and lymphoma. Without any treatment, people suffering from AIDS survive only a few years.
Perhaps, there is no way to cure HIV as of now. But people can stay healthy and live longer with it if they get proper treatment, called antiretroviral therapy (ART). HIV-infected individuals receive a combination of drugs through ART as it reduces the viral load in the infected person's body by preventing replication and immune defense. Sustained suppression of the virus will reduce it to undetectable levels, meaning that blood levels are so low that standard testing cannot even detect the match. A person with this low level has no risk of sexually transmitting the virus to their partner unless they are in a condition called "undetectable = untransmittable" (U=U). ART does not cure HIV, but, it manages the infection and gives the host a normal life expectancy.
HIV is diagnosed by blood testing for HIV or antibodies to the virus. Most people with HIV are diagnosed a few weeks or months after testing on average. There are several types of tests available, including rapid tests that give results in as little as 20 minutes and laboratory tests that can take several days. Testing is a very important part of early detection. The sooner HIV is diagnosed, the faster treatment can be started that can slow the progression of the virus and protect the immune system.
There are several HIV prevention strategies, including condom use with all partners, getting tested for HIV at least once a year, and taking medications such as pre-exposure prophylaxis used by HIV-negative individuals at even greater risk of HIV infection. Another form of prevention is also post-exposure prophylaxis (PEP). This short-term regimen is used when everything else fails and should be started 72 hours after exposure to HIV. National HIV prevention strategies also include harm reduction programs such as needle exchange programs, education about safe sex practices.
There is a growing demand worldwide to eliminate stigma and discrimination against HIV. It is in fact a good barrier to testing, treatment and care. Areas of life where people living with HIV experience discrimination include health care, employment and social relationships. Thus understanding such barriers will provide the necessary support for persons living with HIV to seek care and support. Education and awareness campaigns on this generally aim to reduce stigma through the dissemination of accurate and truthful information about virus transmission and its management.
HIV is considered a major health challenge socially and globally. Millions of people are living with this virus. Ambitious goals set by international organizations such as WHO include the overall goal of creating a world free from the HIV/AIDS epidemic, including testing, treatment and all prevention measures for all people. Treatment progress is increasing, and it can be expected that HIV positive people will be able to lead wonderful and satisfying lives if they receive proper care. Nevertheless, challenges still persist, especially in low and middle-income countries where access to treatment and care is limited.
HIV impacts not only the individual, but also families, communities and society at large. It has a lot of social, economic and psychological effects. It is capable of taking away family members, leaving behind already vulnerable caregivers and making community leaders unable to continue their roles; in many areas of the world it has left its mark on orphanhood and disrupted the social fabric of communities. People living with HIV can also suffer from mental health problems due to stigma, discrimination and isolation and may develop depression, anxiety or similar things.
Public health systems are also now greatly affected due to such a large investment on prevention, testing, treatment and care. Indeed, such efforts should be a continuous input by governments and organizations as they address the causes of their evils – for example, education, health care infrastructure and research on new drugs and vaccines. Despite the fact that a lot has been done to fight HIV disease, the need for efforts continues as the journey never ends. These can range from reducing transmission of the virus to making treatment more available and providing support for HIV-positive individuals.
HIV is a virus that infects the immune system, primarily attacking CD4 cells and severely compromising the body's ability to defend itself against infections and diseases. Infection by HIV occurs through bodily fluids, and prevention can be achieved by certain actions such as safe sexual practices, HIV testing, and the use of PEP and PEP. There is no real cure for HIV, but antiretro viral therapy can make anyone suffering from HIV experience a long, healthy life by making them free from the virus. Early diagnosis and treatment should be very important to give more time to live with the virus and prevent AIDS, the last and most critical stage of HIV infection. HIV is a global health challenge that requires continued efforts to prevent stigma, access to care, and reach a specific goal by which the epidemic ends.
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