The virus may have been present in the United States as early as the mid- to late 1960s, as a sixteen-year-old male named Robert Rayford presented with symptoms in 1966 and died in 1969.An alternative and likely complementary hypothesis points to the widespread use of unsafe medical practices in Africa during years following World War II, such as unsterile reuse of single-use syringes during mass vaccination, antibiotic, and anti-malaria treatment campaigns. Research on the timing of most recent common ancestor for HIV-1 groups M and O, as well as on HIV-2 groups A and B, indicates that SIV has given rise to transmissible HIV lineages throughout the twentieth century. The dispersed timing of these transmissions to humans implies that no single external factor is needed to explain the cross-species transmission of HIV. This observation is consistent with both of the two prevailing views of the origin of the HIV epidemics, namely SIV transmission to humans during the slaughter or butchering of infected primates, and the colonial expansion of sub-Saharan African cities. See also
Antiviral drug
Discovery and development of HIV-protease inhibitors
HIV/AIDS denialism
World AIDS Day

References
Further reading
External links

HIV/AIDS at Curlie
If the foreign body causes problems like pain, vomiting or bleeding it must be removed.Swallowed batteries can be associated with additional damage, with mercury poisoning (from mercury batteries) and lead poisoning (from lead batteries) presenting important risks.While swallowed coins typically traverse the alimentary tract without further incident, care must be taken to monitor patients, as reaction of the metals in the coin with gastric acid and other digestive juices may produce various toxic compounds if the coin remains within the alimentary tract for a prolonged period of time.Endoscopic foreign body retrieval is the first-line treatment for removal of a foreign body from the alimentary tract.Glucagon has been used to treat esophageal foreign bodies, with the intent that it relaxes the smooth muscle of the lower esophageal spincter to allow the foreign body to pass into the stomach. However, evidence does not support a benefit of treatment with glucagon, and its use may result in side effects. See also
101 Things Removed from the Human Body, 2003 British documentary detailing unusual foreign objects located and removed from patients
Bezoar
Rectal foreign body

References


== External links ==