The Food and Drug Administration is warning about inaccurate results from an Abbott Laboratories rapid coronavirus test used by the White House to screen President Trump and Vice President Pence.

President Donald Trump: “I just had a test, as you probably heard. In fact, I had one yesterday, and I had one today. And it’s negative. Mike just had a test, and it’s negative.”

The FDA’s warning on the inaccurate coronavirus test came after preliminary results from a New York University study found it produced false negatives up to 48% of the time.