Lunar quarantine and back-contamination
Because no one knew whether the Moon harbored organisms that could threaten Earth’s biosphere, Apollo 11 enforced strict back-contamination controls on its return. The Lunar Surface Operations Plan specifies the post-splashdown sequence: after a flotation collar was attached, the crew egressed the Command Module, donned biological isolation garments (BIGs), and were carried by helicopter to the recovery ship, where they immediately entered the Mobile Quarantine Facility (MQF) — a sealed trailer.
The crew, the Command Module Columbia, the sample-return containers, film, tapes, and logs were all transported to the Lunar Receiving Laboratory (LRL) at the Manned Spacecraft Center. There the samples were processed in vacuum and biological-preparation laboratories. The crew were quarantined for about 21 days after lunar liftoff. No lunar organisms were ever found, and the quarantine protocol was relaxed after the early landings — but for Apollo 11 it was a central planning constraint.
The program’s medical retrospective (Biomedical Results of Apollo, SP-368) records the verdict and the program’s end: “extensive medical and biological tests determined that no harmful organisms were present in any of the materials returned from the moon, and quarantine was terminated.” Apollo 12’s crew was quarantined the same way; Apollo 14’s crew was the last — after analysis of its samples, “the U.S. postlanding lunar quarantine program ended.” The returned Apollo 11 material was meanwhile distributed to 144 scientists worldwide. The medical side of the crew’s own isolation is covered in crew health and biomedical performance.
The Mission Report (§12.5, Lunar Contamination and Quarantine) records the executed sequence — biological isolation garments donned after splashdown, the Mobile Quarantine Facility aboard USS Hornet, and transfer of the crew and samples to the Lunar Receiving Laboratory.
Related
Section titled “Related”- Command and Service Module Columbia
- Lunar sample collection and containers
- Lunar sample numbering and curation
- Crew health and biomedical performance on Apollo 11
- Apollo 11 mission
Sources
Section titled “Sources”- Apollo 11 Lunar Surface Operations Plan
- Apollo 11 Lunar Sample Information Catalogue
- Apollo 11 Mission Report (MSC-00171)
- Biomedical Results of Apollo (NASA SP-368)