There are now enough doses of vaccine available globally to vaccinate all adults and children, but the demand has dropped so much that governments, vaccination sites, and even the drugmakers themselves are having to dispose of millions of doses.  One of the main problems is that vaccines are packaged in multi-dose vials, and once they’re opened, the rest must be discarded if not used in 12 hours.  Peter Loftus, Pharma reporter at the WSJ, joins us for how the supply has now outstripped the demand.