My grandmother is suffering from Alzheimer's disease.

He is suffering from alopecia.

How does this pathogen infect humans?

My sick friend is fighting his illness with cheerfulness every day.

My younger sister is hospitalized with a childhood disease.

I'm feeling down because of May sickness.

He was diagnosed with bipolar disorder and began treatment.

He got sunstroke because he was exposed to sunlight for a long time.

My daughter caught fifth disease last week.

It takes 60 seconds for the second hand to go around once.