Chabadinfo in collaboration with Beis Moshiach Magazine presents: The Rebbe’s Opinion On, a series featuring the Rebbe’s opinion and directive on various subjects • In 5729 (1969), Professor Velvel Greene was, among other things, engaged in the study of epidemiology. While his research focused on the environmental change that the bacteria undergo, the Rebbe suggested in a post script that he investigate the qualitative change and connected this matter to Avodas Hashem • Full Article