At the end of 2020, approximately 37.6 million people worldwide were living with human immunodeficiency virus (HIV) infection and over 35 million people have died as a consequence of the acquired immunodeficiency syndrome (AIDS). Opportunities to prevent new HIV infection…
Epidemiology On December 31, 2019, the World Health Organization (WHO) was informed of a cluster of cases of pneumonia of unknown cause in Wuhan City, Hubei Province, China. On January 9, 2020, a novel coronavirus (named severe acute respiratory syndrome…
Sexually Transmitted Infections Definition Sexually transmitted infections (STIs) include a wide variety of organisms that are transmitted through intimate contact involving skin or mucosal surfaces of the oropharynx, vagina, penis, and rectum. STIs can generally be divided into five broad…