The first human <a href="https://en.wikipedia.org/wiki/Blood_transfusion" id="mwgQ" rel="mw:WikiLink" title="Blood transfusion">blood transfusion</a> is administered by Dr. <a href="https://en.wikipedia.org/wiki/Jean-Baptiste_Denys" id="mwgg" rel="mw:WikiLink" title="Jean-Baptiste Denys">Jean-Baptiste Denys</a>.