ANNAPOLIS, MD (AP) – Gov. Larry Hogan says Maryland will double its mass vaccination sites to a dozen next month. Hogan also discussed a call with the White House. He says governors were told to expect a significant increase in vaccine supply starting next week and “continuing each week for several months.” Hogan described the call with the White House as “a very hopeful call,” with an expectation of “really big numbers” of the Johnson & Johnson vaccine, as well as continual increases with the Pfizer and Moderna vaccines.