Q. Who developed the first successful polio vaccine?

पोलियो का पहला सफल टीका किसने विकसित किया?

A
Jonas Salk
जोनास साल्क
B
Louis Pasteur
लुई पाश्चर
C
Edward Jenner
एडवर्ड जेनर
D
Alexander Fleming
अलेक्जेंडर फ्लेमिंग

Explanation

In the early 1950s, Dr. Jonas Salk developed the first effective vaccine against poliomyelitis (polio). His inactivated (killed-virus) vaccine was introduced in 1955 and led to a dramatic decline in polio cases worldwide.

1950 के दशक के आरंभ में, डॉ. जोनास साल्क ने पोलियोमाइलाइटिस (पोलियो) के विरुद्ध पहला प्रभावी टीका विकसित किया। उनके निष्क्रिय (मृत-विषाणु) टीके को 1955 में बाज़ार में उतारा गया और इसके परिणामस्वरूप दुनिया भर में पोलियो के मामलों में नाटकीय गिरावट आई।

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