DEERFIELD, Ill., 2016-Sep-30 — /EPR Retail News/ — Walgreens and the United Nations (UN) Foundation today (September 28, 2016) announced the launch of the 2016 Get a Shot. Give a Shot.® campaign, a fourth-year collaboration to help provide life-saving vaccines to children in developing countries. Now through Aug. 31, 20171, for every flu shot or…