Question

BCG वैक्सिन की खोज सन में हुई थी
​

Answer 1

$❤\huge \bold \pink {Answer❤}$

They were two French scientists who from 1905 had been working on developing a vaccine against TB. BCG is an abbreviation of Bacillus Calmette-Guerin, meaning the bacilli of Calmette and Guerin. Between 1905 and 1918, Calmette and Guerin carried out research into the mechanisms of tuberculosis infection.