The three NASA astronauts who returned to Earth on the Crew-8 mission declined to discuss the medical issue that prompted a trip to the hospital after their return and, for one of them, an overnight stay.

NASA astronauts Michael Barratt, Matthew Dominick and Jeanette Epps, along with Roscosmos cosmonaut Alexander Grebenkin, returned to Earth Oct. 25 on a Crew Dragon spacecraft, concluding the 235-day Crew-8 mission. But later that day NASA said that the four were taken to a Pensacola, Florida, hospital for additional medical evaluations “out of an abundance of caution.” One of the NASA astronauts was hospitalized in stable condition there, but released the next day “in good health.”

NASA did not disclose the identity of the astronaut who was hospitalized or the specific medical concern that prompted the hospital visit. At a Nov. 8 press conference to discuss their mission, the three NASA astronauts declined to discuss details about the incident, citing medical privacy.