Unused vaccines pile up across U.S. as some regions resist Syringes filled with the Pfizer COVID-19 vaccine are shown, Thursday, April 15, 2021, at the Christine E. Lynn Rehabilitation Center in Jackson Memorial hospital in Miami. (AP Photo/Wilfredo Lee) Published April 16. 2021 1:24AM Anna Edney and Drew Armstrong, Bloomberg Many U.S. states and cities have a growing surplus of coronavirus vaccines, a sign that in some places demand is slowing before a large percentage of the population has been inoculated, according to an analysis by Bloomberg News. The data indicates that as many as 1 in 3 doses is unused in some states. Appointments for shots often go untaken, with few people signing up.