A 'letter to the editor' in response to the Down to Earth issue, 'BCG has failed: would oral polio vaccine be the next?' with a covering letter to N Ravi, editor of The Hindu, in 1999 Bhargava, Pushpa Mittra, 1928-2017 Articles and correspondence are enclosed. 1999 1 file with textual records and 1 booklets https://libraryarchives.azimpremjiuniversity.edu.in//a-letter-to-the-editor-in-response-to-the-down-to-earth-issue-bcg-has-failed-would-oral-polio-vaccine-be-the-next-with-a-covering-letter-to-n-ravi-editor-of-the-hindu-in-1999 57-4 eng