His nature is very kind.

He contracted severe invasive streptococcal disease and underwent emergency surgery.

He is mindful of healthy eating and exercise to reduce the risk of cardiovascular disease.

She has an autoimmune disease.

Ebola virus disease is highly infectious and can cause severe symptoms.

He is clearly a night owl, working late into the night and sleeping late into the morning.

I wrote a program using a bool type variable.

A boolean variable can hold a value of true or false.

To declare an integer type variable, use 'int'.

In this program, we are using a variable of int type.