Chronic obstructive pulmonary disease (COPD) causes a loss of lung function, while sepsis is a potentially life-threatening inflammation from a severe infection.

According to the Chronic Obstructive Pulmonary Disease Association (Singapore) website, COPD consists of two chronic lung diseases: Emphysema and chronic bronchitis.

These diseases are characterised by obstruction to air flow in and out of the lungs.

COPD symptoms include chronic cough, phlegm and shortness of breath.

Acute infections or weather conditions may worsen the symptoms.

COPD is incurable, but treatment can help to ease the symptoms and slow the damage to one's lungs.

Types of treatment include using inhalers, vaccinations and undergoing oxygen therapy.