Desperate heroin users in African countries have turned to sharing blood with one another in order to prevent withdrawals, or in order to share a high. This practice is known as “flashblooding” or “flushblooding” and although this is not widespread it is highly dangerous considering the high percentage of adults infected with HIV in Africa. So far “flushblooding” has only been observed in Dar es Salaam, Tanzania, the island of Zanzibar and in Mombasa, Kenya. However just as the number of drug addiction continues to grow, sadly so will the number of people “flashblooding”.
http://www.nytimes.com/2010/07/13/health/13blood.html
