There are differences between HIV types 1 and 2 in terms of distribution, source of the virus and pathogenicity. 1. Different distribution: HIV type 1 is the main epidemic type of HIV, distributed worldwide. HIV type 2 is mainly distributed in western Africa, Western Europe and North America also has a small distribution. 2. The source of the virus: HIV type 1 may be transmitted from chimpanzees to humans, while HIV type 2 is transmitted from white-browed monkeys to humans across species. 3. Differences in pathogenicity: HIV type 1 is more pathogenic than HIV type 2. Regardless of which type of HIV is infected, you should go to a regular hospital in time and under the guidance of a professional doctor for active treatment, so as not to delay your condition.