The AIDS epidemic, caused by HIV, found its way to the United States between the 1970s and 1980s, but was first noticed after doctors discovered clusters of Kaposi's sarcoma and pneumocystis pneumonia in homosexual men in Los Angeles, New York City, and San Francisco in 1981. Treatment of HIV/AIDS is primarily via the use of multiple antiretroviral drugs, and education programs to help people avoid infection.
HIV/AIDS originated in Africa in the early 20th century and is a major public health concern and cause of death in many African countries. AIDS rates vary significantly between countries, though the majority of cases are concentrated in Southern Africa. Although the continent is home to about 15.2 percent of the world's population, more than two-thirds of the total infected worldwide – some 35 million people – were Africans, of whom 15 million have already died. Eastern and Southern Africa alone accounted for an estimated 60 percent of all people living with HIV and 70 percent of all AIDS deaths in 2011. The countries of Eastern and Southern Africa are most affected, AIDS has raised death rates and lowered life expectancy among adults between the ages of 20 and 49 by about twenty years. Furthermore, the life expectancy in many parts of Africa is declining, largely as a result of the HIV/AIDS epidemic with life-expectancy in some countries reaching as low as thirty-nine years.
Tropical medicine is an interdisciplinary branch of medicine that deals with health issues that occur uniquely, are more widespread, or are more difficult to control in tropical and subtropical regions.
HIV/AIDS has been a public health concern for Latin America due to a remaining prevalence of the disease. In 2018 an estimated 2.2 million people had HIV in Latin America and the Caribbean, making the HIV prevalence rate approximately 0.4% in Latin America.
The global epidemic of HIV/AIDS began in 1981, and is an ongoing worldwide public health issue. According to the World Health Organization (WHO), as of 2021, HIV/AIDS has killed approximately 40.1 million people, and approximately 38.4 million people are infected with HIV globally. Of these 38.4 million people, 75% are receiving antiretroviral treatment. There were about 770,000 deaths from HIV/AIDS in 2018, and 680,000 deaths in 2020. The 2015 Global Burden of Disease Study estimated that the global incidence of HIV infection peaked in 1997 at 3.3 million per year. Global incidence fell rapidly from 1997 to 2005, to about 2.6 million per year. Incidence of HIV has continued to fall, decreasing by 23% from 2010 to 2020, with progress dominated by decreases in Eastern Africa and Southern Africa. As of 2020, there are approximately 1.5 million new infections of HIV per year globally.
In 2008, 4.7 million people in Asia were living with human immunodeficiency virus (HIV). Asia's epidemic peaked in the mid-1990s, and annual HIV incidence has declined since then by more than half. Regionally, the epidemic has remained somewhat stable since 2000.
The Caribbean is the second-most affected region in the world in terms of HIV prevalence rates. Based on 2009 data, about 1.0 percent of the adult population is living with the disease, which is higher than any other region except Sub-Saharan Africa. Several factors influence this epidemic, including poverty, gender, sex tourism, and stigma. HIV incidence in the Caribbean declined 49% between 2001 and 2012. Different countries have employed a variety of responses to the disease, with a range of challenges and successes.
HIV/AIDS is one of the most serious health concerns in South Africa. The country has the highest number of people afflicted with HIV of any country, and the fourth-highest adult HIV prevalence rate, according to the 2019 United Nations statistics.
The prevalence of circumcision is the percentage of males in a given population who have been circumcised, with the procedure most commonly being performed as a part of prophylactic healthcare, a religious obligation, or cultural practice. Yosha & Bolnick & Koyle (2012) states that the global incidence of circumcision has risen and seems likely to continue to do so during the "first half of the twenty-first century".
Botswana is experiencing one of the most severe HIV/AIDS epidemics in the world. The national HIV prevalence rate among adults ages 15 to 49 is 24.8 percent, which is the third highest in the world, behind Lesotho and Eswatini. HIV/AIDS threatens the many developmental gains Botswana has achieved since its independence in 1966, including economic growth, political stability, a rise in life expectancy, and the establishment of functioning public educational and health care systems.
The Democratic Republic of the Congo was one of the first African countries to recognize HIV, registering cases of HIV among hospital patients as early as 1983.
HIV/AIDS is considered the deadliest epidemic in the 21st century. It is transmitted through sex, intravenous drug use and mother-to-child transmission. Zambia is experiencing a generalized HIV/AIDS epidemic, with a national HIV prevalence rate of 11.3% among adults ages 15 to 49 as of 2018. Per the 2000 Zambian census, the people affected by HIV/AIDS constituted 15% of the total population, amounting to one million, of which 60% were women. The pandemic results in increased number of orphans, with an estimated 600,000 orphans in the country. It was prevalent more in urban areas compared to rural and among all provinces, Copperbelt Province and Lusaka Province had higher occurrence.
According to the Global Fund, Honduras is the Central American country most adversely affected by the HIV/AIDS epidemic. As of 1998, Honduras had the highest prevalence of HIV out of all seven Central American countries according to a study published by the office of the Honduran Secretary of Public Health. As of that same year, Hondurans made up only 17% of the Central American population, yet Honduras contained 50% of the initial AIDS cases in Central America and 60% of all Central American cases in 2001. In more recent years, new HIV infections have decreased by 29% since 2010 while AIDS-related deaths have increased by 11% since then. HIV/AIDS heavily affects the young, active, working population in Honduras, and HIV/AIDS deaths account for 10% of the overall national mortality rate. As of 2008, AIDS was the leading cause of death among Honduran women of childbearing age and the second-leading cause of hospitalization among both men and women. Sexually transmitted infections are common, and condom use in risky sexual encounters is sporadic and variable. HIV remains a mainly heterosexual epidemic in Honduras, as 90% of emerging infections are attributed to heterosexual transmission. It is estimated that the prevalence of HIV among Honduran adults is 1.5%.
With an estimated 150,000 people living with HIV/AIDS in 2016, Haiti has the most overall cases of HIV/AIDS in the Caribbean and its HIV prevalence rates among the highest percentage-wise in the region. There are many risk-factor groups for HIV infection in Haiti, with the most common ones including lower socioeconomic status, lower educational levels, risky behavior, and lower levels of awareness regarding HIV and its transmission. However, HIV prevalence in Haiti is largely dropping as a result of a strong AIDS/HIV educational program, support from non-governmental organizations and private donors, as well as a strong healthcare system supported by UNAIDS. Part of the success of Haiti's HIV healthcare system lies in the governmental commitment to the issue, which alongside the support of donations from the Global Fund and President's Emergency Plan For AIDS Relief (PEPFAR), allows the nation to prioritize the issue. Despite the extreme poverty afflicting a large Haitian population, the severe economic impact HIV has on the nation, and the controversy surrounding how the virus spread to Haiti and the United States, Haiti is on the path to provide universal treatment, with other developing nations emulating its AIDS treatment system.
In precolonial Ghana, infectious diseases were the main cause of morbidity and mortality. The modern history of health in Ghana was heavily influenced by international actors such as Christian missionaries, European colonists, the World Bank, and the International Monetary Fund. In addition, the democratic shift in Ghana spurred healthcare reforms in an attempt to address the presence of infectious and noncommunicable diseases eventually resulting in the formation of the National Health insurance Scheme in place today.
Botswana's healthcare system has been steadily improving and expanding its infrastructure to become more accessible. The country's position as an upper middle-income country has allowed them to make strides in universal healthcare access for much of Botswana's population. The majority of the Botswana's 2.3 million inhabitants now live within five kilometers of a healthcare facility. As a result, the infant mortality and maternal mortality rates have been on a steady decline. The country's improving healthcare infrastructure has also been reflected in an increase of the average life expectancy from birth, with nearly all births occurring in healthcare facilities.
Health in the Central African Republic has been degraded by years of internal conflict and economic turmoil since independence from France in 1960. One sixth of the country's population is in need of acute medical care. Endemic diseases put a high demand on the health infrastructure, which requires outside assistance to sustain itself.
As of 2009, it is estimated that there are 33.3 million people worldwide infected with HIV. HIV/AIDS prevalence rates in South America vary from 0.20% in Bolivia to 1.50% in Trinidad and Tobago.
Since reports of emergence and spread of the human immunodeficiency virus (HIV) in the United States between the 1970s and 1980s, the HIV/AIDS epidemic has frequently been linked to gay, bisexual, and other men who have sex with men (MSM) by epidemiologists and medical professionals. It was first noticed after doctors discovered clusters of Kaposi's sarcoma and pneumocystis pneumonia in homosexual men in Los Angeles, New York City, and San Francisco in 1981. The first official report on the virus was published by the Center for Disease Control (CDC) on June 5, 1981 and detailed the cases of five young gay men who were hospitalized with serious infections. A month later, The New York Times reported that 41 homosexuals had been diagnosed with Kaposi's sarcoma, and eight had died less than 24 months after the diagnosis was made.
