When asked at Friday’s news conference which one had been sick, the astronauts refused to comment. Barratt, a doctor who specializes in space medicine, declined to even describe the symptoms that the unidentified astronaut had.
“Spaceflight is still something we don’t fully understand. We’re finding things that we don’t expect sometimes. This was one of those times and we’re still piecing things together on this,” said Barratt, the only member of the crew who had flown in space before.