He likes to take a walk in the park at dusk.

We should always remember the power of Kannon in difficult times.

The feline immunodeficiency virus can potentially have serious effects on a cat's health.

My cat has been infected with the feline immunodeficiency virus.

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

The human immunodeficiency virus is the virus that causes AIDS.

Because he suffers from selective mutism, it's difficult for him to speak.

My grandmother is suffering from osteoporosis.

She suffers every month because of dysmenorrhea.

My dog recently contracted strongylosis.