He is suffering from a chronic disease.

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.

Tularemia is highly infectious and can potentially infect humans as well.

My daughter caught fifth disease last week.

Souusuke is my best friend.

He is waiting eagerly for the release of the new game.

In this situation, the proverb 'it is best to submit to circumstances' applies.