The main purpose of this poster is to

explain the reasons why Scott contracted HIV.

share Scott's personal story about living with HIV.

show that HIV is spreading throughout the population.

encourage the public to support the fight against HIV.

Option: To show that HIV is spreading throughout the population. And to encourage the public to support the fight against HIV.

Explanation:

Human Immune deficiency virus (HIV), is very dangerous to the overall body system and more over defense lines of the human body. As, it makes the body more vulnerable to other diseases and disorders and the body is no more able to protect itself from the various pathogens. However, there should be campaigns carried out for the purpose of awareness among the masses and tell the people how to protect themselves and others from such chronic disorders.

Show that HIV is spreading throughout the population.

Encourage the public to support the fight against HIV.

Explanation:

These are the two main purposes of this poster. This poster is intended to show the fact that HIV is spreading throughout the population. HIV (human immunodeficiency virus) is a type of retrovirus that affects humans. These viruses cause AIDS (acquired immunodeficiency virus) over time. The poster wants to show the fact that HIV is spreading, as well as encourage the support of the public in order to fight against HIV.