An infectious disease causing high mortality rates.

A sudden outbreak of a disease or condition.

रोग का प्रकोप

English Usage: The sudden plague of pneumonia took many by surprise.

Hindi Usage: सूचना का अचानक प्रकोप कई लोगों को हैरान कर दिया।

An inflammatory condition of the lungs.

Can refer to a serious illness of the lungs, used in a metaphorical sense.

फेफड़ों की गंभीर बीमारी

English Usage: The team's poor performance was like pneumonia to their championship hopes.

Hindi Usage: टीम के खराब प्रदर्शन ने उनके चैंपियनशिप की उम्मीदों को सूजन की तरह प्रभावित किया।