Trump, who implored pregnant women not to take Tylenol, is only the last of a long series of people who offer advice not requested from the mothers waiting.
The airport safety area was closed during the night to protect passengers from smoking. He reopened shortly before dawn, but a spokesman said there would be flight breaks.
The president delivered fans - albeit scientifically doubtful - observes what he described as one of the "most alarming public health developments in history".
Alaa Abd El Fattoh, a double British-Egyptian citizen, has been imprisoned for most of the last 12 years as a dissident. He and his mother made a hunger strike to press for his release.