Moderate exercise and a balanced diet are important for maintaining the health of the respiratory system.

He is connected to a ventilator due to his severe condition.

Well then, I'm off.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

His father fell into a persistent vegetative state due to a traffic accident.

Middle East respiratory syndrome is a viral infection that causes severe pneumonia.

In 2003, Severe Acute Respiratory Syndrome (SARS) spread all over the world.