Submitted by Ed Hooper on Mon, 22/04/2013 - 12:00am
Sent to the Letters page of the NYT on 22/4/2013, but not printed...
Letter to the editor: re "Hilary Koprowski, Who Developed First Live-Virus Polio Vaccine, Dies at 96", by Margalit Fox; (4/20/13).
Sir,