which country has the most number of patients?
Eastern and southern Africa
HIV/AIDS
In 2018, about 37.9 million people were living with HIV and it resulted in 770,000 deaths. An estimated 20.6 million of these live in eastern and southern Africa. 
the virus of aids affects the growth of UNANSWERABLE how can it be diagnosed? It is diagnosed via laboratory testing and then staged based on the presence of certain signs or symptoms. where was it found first? Both HIV-1 and HIV-2 are believed to have originated in non-human primates in West-central Africa and were transferred to humans in the early 20th century.
wiki:2371248
HIV/AIDS [SEP] Introduction
Treatment is recommended as soon as the diagnosis is made. Without treatment, the average survival time after infection is 11 years. In 2018, about 37.9 million people were living with HIV and it resulted in 770,000 deaths. An estimated 20.6 million of these live in eastern and southern Africa. Between the time that AIDS was identified (in the early 1980s) and 2018, the disease caused an estimated 32 million deaths worldwide. HIV/AIDS is considered a pandemic—a disease outbreak which is present over a large area and is actively spreading. HIV made the jump from other primates to humans in west-central Africa in the early-to-mid 20th century.