art002e027809 (April 8, 2026) – NASA astronaut Reid Wiseman prepares to collect a saliva sample aboard the Orion spacecraft for the Artemis II Immune Biomarkers study, which uses proteins, enzymes, and other biomarkers found in saliva samples to learn more about how the crew adapted to spaceflight. These biomarkers give insight into crews’ immune health, inflammation, nutritional status, bone health, and more. Credit: NASA
Date April 8, 2026