NASA's first medical evacuation from the International Space Station (ISS) occurred on January 14, 2026, when SpaceX Crew Dragon undocked carrying four astronauts home six weeks early due to a serious but stable medical condition with one crew member. This ended a 25-year streak without such an event, despite statistical models predicting one every three years. The crew splashed down safely off California on January 15 after 167 days in space.
NASA's first medical evacuation from the International Space Station (ISS) occurred on January 14, 2026, when SpaceX Crew Dragon undocked carrying four astronauts home six weeks early due to a serious but stable medical condition with one crew member. This ended a 25-year streak without such an event, despite statistical models predicting one every three years. The crew splashed down safely off California on January 15 after 167 days in space.
The ISS operated with a skeleton crew of three until SpaceX Crew-12 launched on February 13, 2026, from Cape Canaveral, carrying NASA astronauts Jessica Meir and Jack Hathaway, ESA astronaut Sophie Adenot, and Roscosmos cosmonaut Andrey Fedyaev. Docking is scheduled for February 14, returning the station to its standard seven-person complement and closing the staffing gap caused by the evacuation.
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People Involved
Zena Cardman
Crew-11 Commander (Returned to Earth)
Michael Fincke
Crew-11 Pilot (Returned to Earth)
Kimiya Yui
Crew-11 Mission Specialist (Returned to Earth)
Oleg Platonov
Crew-11 Mission Specialist (Returned to Earth)
Jared Isaacman
NASA Administrator (Managing evacuation)
Chris Williams
ISS Flight Engineer (Remaining) (Aboard ISS)
Jessica Meir
Crew-12 NASA Astronaut (En route to ISS)
Jack Hathaway
Crew-12 NASA Astronaut (En route to ISS)
Sophie Adenot
Crew-12 ESA Astronaut (En route to ISS)
Andrey Fedyaev
Crew-12 Roscosmos Cosmonaut (En route to ISS)
Organizations Involved
NA
National Aeronautics and Space Administration (NASA)
Federal Agency
Status: Managing evacuation and ISS transition
The U.S. space agency operating the American segment of the ISS and coordinating commercial crew missions.
SP
SpaceX
Commercial Space Company
Status: Conducting evacuation
The primary provider of crew transportation to the ISS under NASA's Commercial Crew Program since 2020.
Timeline
Crew-12 Docks at ISS (Scheduled)
Docking
Crew Dragon Freedom scheduled to dock autonomously to Harmony module, enabling crew transfer and full restoration of Expedition 74 staffing.
Crew-12 Launches to ISS
Launch
SpaceX Crew Dragon Freedom lifts off from Cape Canaveral Space Force Station carrying NASA astronauts Jessica Meir and Jack Hathaway, ESA astronaut Sophie Adenot, and Roscosmos cosmonaut Andrey Fedyaev. Docking targeted for Feb 14 at 3:15 p.m. EST to restore full seven-person crew.
Crew-11 Splashdown (Scheduled)
Recovery
Crew Dragon expected to splash down off the coast of California, completing the first medical evacuation in ISS history.
NASA Post-Splashdown Press Conference
Communications
Administrator Isaacman confirms 'the crew member of concern is doing fine' and praises the team's professional response. All four crew members will spend the night at a San Diego hospital before returning to Houston.
Crew-11 Splashes Down Off California Coast
Recovery
Crew Dragon Endeavour lands in the Pacific Ocean off San Diego after 167 days in space. All four crew members emerge smiling and giving thumbs up, transferred to recovery vessel Shannon within 30 minutes. This completes the first medical evacuation in ISS history.
Crew-11 Undocks from ISS
Operations
SpaceX Crew Dragon Endeavour undocks from the Harmony module, beginning the return journey with all four crew members aboard.
Change of Command Ceremony
Operations
Crew-11 conducts accelerated handover procedures, transferring ISS command ahead of schedule.
NASA Announces Early Return
Decision
Administrator Isaacman holds press conference announcing the first medical evacuation in ISS history. He confirms the condition is serious but stable and cannot be properly treated in orbit.
Medical Situation Occurs
Medical
A Crew-11 member experiences an undisclosed medical condition. A planned spacewalk for January 8 is immediately cancelled.
Jared Isaacman Sworn In as NASA Administrator
Leadership
Former Inspiration4 commander takes the helm at NASA, less than a month before facing his first major operational decision.
Chris Williams Arrives on Soyuz
Crew Arrival
NASA astronaut Chris Williams and two Russian cosmonauts arrive aboard Soyuz MS-28, joining the Crew-11 members as part of Expedition 74.
ISS Marks 25 Years of Continuous Occupation
Milestone
The station celebrates a quarter century of uninterrupted human presence, with more than 290 people from 26 countries having lived aboard.
Crew-11 Launches to ISS
Launch
SpaceX Crew Dragon carrying Cardman, Fincke, Yui, and Platonov lifts off from Kennedy Space Center for a planned 6-8 month mission.
Blood Clot Treated in Orbit
Medical
An astronaut is diagnosed with deep vein thrombosis during a research ultrasound. Ground physicians guide treatment with blood thinners, and the crew member completes the mission without evacuation.
First Crew Arrives at ISS
Milestone
Expedition 1 crew begins continuous human occupation of the International Space Station, a streak that continues to this day.
Scenarios
1
Crew Member Recovers, Crew-12 Launches on Schedule
Discussed by: NASA officials, spaceflight analysts at SpaceNews and Ars Technica
The affected crew member receives treatment on the ground and recovers fully. The identity and condition may or may not be disclosed publicly, per medical privacy considerations. Crew-12 launches in mid-February as planned, restoring full ISS staffing. This becomes a validation of NASA's medical protocols rather than a crisis point.
2
Crew-12 Launch Accelerated, Staffing Gap Minimized
Discussed by: NASA mission planners, industry observers at NASASpaceFlight.com
NASA pushes Crew-12's launch earlier than the February 15 target to reduce the period of skeleton crew operations. This requires accelerating spacecraft and crew readiness but maintains research continuity aboard the station.
Discussed by: Former astronauts, ISS program analysts
Technical or weather issues delay Crew-12 beyond mid-February. Chris Williams operates as the sole American aboard for weeks, limiting U.S. research activities and maintenance capabilities. This raises questions about ISS operational resilience as it approaches end of life.
4
Medical Protocols Revised for Future Missions
Discussed by: Space medicine experts at Scientific American, former NASA flight surgeons
The evacuation prompts NASA to re-evaluate medical capabilities aboard the ISS and requirements for future commercial stations. Discussions intensify about enhanced diagnostic equipment, telemedicine capabilities, and crew medical training for long-duration missions to the Moon and Mars.
Historical Context
Salyut 7 Medical Evacuation (1985)
November 1985
What Happened
Soviet commander Vladimir Vasyutin fell seriously ill two months into his mission aboard the Salyut 7 space station. The condition was severe enough that he and his two crewmates returned to Earth early. Soviet officials never publicly disclosed the nature of his illness.
Outcome
Short Term
The crew landed safely. Vasyutin never flew in space again.
Long Term
The incident remained one of only a handful of documented early returns for medical reasons in Soviet/Russian space station history, predating the ISS era.
Why It's Relevant Today
The closest precedent to the Crew-11 situation. Unlike the ISS, Soviet stations lacked the robust medical support network now available through constant communication with ground teams.
ISS Blood Clot Treatment (2019)
2019
What Happened
An astronaut was diagnosed with deep vein thrombosis in the jugular vein during a routine research ultrasound—the first such case in space. Radiologists on Earth guided the astronaut through follow-up scans in real time. NASA physician Dr. Stephan Moll was brought in as a consultant.
Outcome
Short Term
The astronaut was treated with blood thinners available aboard the station, supplemented by an emergency resupply. The mission continued without evacuation.
Long Term
The case was published in the New England Journal of Medicine and informed protocols for treating vascular conditions in microgravity.
Why It's Relevant Today
Demonstrates the difference between conditions that can be managed in orbit and those requiring ground-based care. The blood clot was serious but treatable with available resources; the Crew-11 condition apparently was not.
Apollo 13 Emergency Return (1970)
April 1970
What Happened
An oxygen tank explosion 56 hours into the mission crippled the command module, forcing astronauts Jim Lovell, Jack Swigert, and Fred Haise to use the lunar module as a lifeboat. Engineers improvised solutions to power, navigation, and carbon dioxide removal problems in real time.
Outcome
Short Term
The crew splashed down safely after four harrowing days. Fred Haise suffered a kidney infection but recovered.
Long Term
Called 'NASA's finest hour,' the mission prompted extensive spacecraft redesigns and established protocols for in-flight emergencies that inform procedures to this day.
Why It's Relevant Today
While a mechanical rather than medical emergency, Apollo 13 established the principle that getting crew home safely supersedes mission objectives—the same calculus NASA applied to Crew-11.
