President Trump on Thursday declared the opioid crisis a "public health emergency" but stopped short of the designation of a "national emergency." (Read a recap of his speech here.) That distinction matters because it affects how much federal aid will be made available to states, and while critics think the move isn't sweeping enough, White House officials argue that the president's choice makes the most sense for this particular problem. Here's a look at what the designation will and won't do, including how it aims to increase the use of "telemedicine" to treat patients from afar: