This virus can be transmitted from human to human.

He is living as one person.

This park is always bustling with people.

This park is overflowing with people.

Hominidae is a family that includes part of the primates, including humans, chimpanzees, and gorillas.

I often go to one-man karaoke sessions on weekends.

The one-humped camel lives in the desert.

She dyed her hair blue.

The human immunodeficiency virus destroys the immune system, causing the body to lose its ability to fight disease.

It is important to learn about the prevention and treatment of the human immunodeficiency virus.