Trump gets experimental drug aimed at curbing severe illness

The experimental antibody drug given to President Donald Trump has been called one of the most promising approaches to preventing serious illness from a COVID-19 infection.

Its maker, Regeneron Pharmaceuticals Inc., said the company agreed to supply a single dose, given through an IV, for Trump at the request of his physician under “compassionate use” provisions, when an experimental medicine is provided on a case-by-case emergency basis, while studies of it continue.

The new drug is in late-stage testing and its safety and effectiveness are not yet known. No treatment...