Which type of HIV is characterized as more infectious and common?

Human Immunodeficiency Virus (HIV) consists of two main types: Type 1 and Type 2, with Type 1 being the most common and widespread globally. Type 1 is primarily responsible for the majority of HIV infections and is significantly more infectious compared to Type 2.

Type 1 is prevalent in most parts of the world, whereas Type 2 is found predominantly in West Africa and is less easily transmitted. Type 1 not only has higher rates of transmission but also progresses to AIDS more rapidly than Type 2 in most cases. Therefore, when considering the overall infectiousness and commonality of HIV types, Type 1 is clearly the predominant strain.

This distinction is important in understanding the epidemiology of the virus, its transmission routes, and its impact on public health.