Mar.11 -- William Haseltine, a former Harvard Medical School researcher and a pioneering AIDS researcher who now chairs Access Health International Inc., a New York-based think tank, discusses the Covid-19 vaccinations in the U.S. Haseltine, who is author of "A Family Guide to Covid" and "A Covid Back to School Guide," speaks with Shery Ahn and Haidi Stroud-Watts on "Bloomberg Daybreak: Australia."