The <a href="https://en.wikipedia.org/wiki/Food_and_Drug_Administration" id="mwAZk" rel="mw:WikiLink" title="Food and Drug Administration">Food and Drug Administration</a> approves a <a href="https://en.wikipedia.org/wiki/Blood_test" id="mwAZo" rel="mw:WikiLink" title="Blood test">blood test</a> for <a href="https://en.wikipedia.org/wiki/HIV" id="mwAZs" rel="mw:WikiLink" title="HIV">HIV</a> infection, used since then for screening all <a href="https://en.wikipedia.org/wiki/Blood_donation" id="mwAZw" rel="mw:WikiLink" title="Blood donation">blood donations</a> in the United States.