Prince Harry's whirlwind trip through South Africa [1] might have come to a close, but that hasn't stopped his parade of charitable official visits [2]. On Monday, Harry stopped by Mildmay [3], a hospital dedicated to treating patients with HIV, to celebrate its 150th anniversary and ring in the opening of their new complex in London. Dressed in a smart navy-blue suit and sporting a full face of scruff, Harry greeted the children gathered outside the hospital with a big smile. Keep reading to see more photos, and then check out the best snaps of the British royals [4] from 2015!