According to the route of transmission, what are the high-risk groups of AIDS?

The so-called high-risk groups of AIDS refer to those who may be at risk of contracting HIV, but have not yet been infected. Due to the particularity of AIDS epidemic in different continents, countries have slightly different definitions of high-risk groups.

American scholars define gay or bisexual men during sexual activity, current or past intravenous drug users, Haitian immigrants in the United States and hemophiliacs as high-risk groups. In the United States, most male AIDS cases come from homosexuals or bisexuals (75%) and intravenous drug users; Most female cases come from sexual partners who are addicted to intravenous drugs and infected with HIV; Children's cases mostly come from families whose parents are HIV-infected or AIDS patients, or from blood or blood products contaminated by HIV.

The situation in Europe is somewhat different. European scholars define sexual partners (male or female) of gay and bisexual men, intravenous drug users, hemophiliacs and HIV-infected people as high-risk groups. In Europe, male AIDS cases are not only from homosexuals or bisexuals (60%) and intravenous drug users, but also from female sexual partners of HIV-infected people, mainly some African immigrants, who are mainly infected with AIDS due to promiscuity.