Fig. 10.

Extravehicular activity (EVA) data. A: incidence of viral shedding in crewmembers who completed an EVA during their 6-mo International Space Station (ISS) mission and those that did not perform EVAs during their mission period. B: salivary cortisol concentrations in ISS crewmembers who completed and did not complete EVA. Values are means ± SE. Differences between groups: ^#P < 0.05, ^##P < 0.01. Time points are n days before launch (L−n), n days into flight (FDn), and n days after return to Earth (R+n).