How is aids, which is a sexually transmitted disease, likely affecting the age distribution in countries hard hit by the epidemic?

AIDS is acquired immuno  deficiency syndrome caused by the human immunodeficiency virus. The virus attacks on the T helper immune cells of the individual.

AIDS can be spread by the unhealthy sex or the individual that have multiple sex partners. The reproductively active adults are affected by the AIDS. This reduces the number of the individuals that are sexually active. The older people will dominate and shows on top - heavy age distribution.

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