NASA astronaut Jeanette Epps has her left arm extended towards the camera. Epps holds a syringe in her right hand. Epps is looking at the camera with a slight smile, wearing a black t-shirt, black pants with Velcro strips, and a black headband.

NASA astronaut Jeanette Epps processes blood and saliva samples

iss071e414653 (Aug. 1, 2024) NASA astronaut Jeanette Epps stows blood and saliva samples from the Immunity Assay experiment in a science freezer for future analysis. Immunity Assay aims to develop an in-flight functional immune test to monitor how spaceflight stressors affect immune functions in space.

Image Credit: NASA

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NASA astronaut Jeanette Epps processes blood and saliva samples

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