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

He missed school because of sickness.

I have a severe headache due to meteoropathy.

My grandfather is suffering from Parkinson's disease.

He lost his temper after losing the game.

I get motion sickness as soon as I get on a boat.

I caught a cold, so I decided to take a sick leave.

Taking care of a sick child is tough.

My younger brother is a sick child, always under the care of a doctor.

He says 'sickness and health start with the mind,' and strives to have positive thoughts every day.