Table 8-3. Medical Events and Recurrences Among Astronauts of All Nationalities on Mir, March 14, 1995, through June 12, 1998. Event Number of Events Superficial injury 43 Arrhythmia 32 Musculoskeletal 29 Headache 17 Sleeplessness 13 Fatigue 17 Contact dermatitis 5 Surface burn 5 Conjunctivitis 4 Acute respiratory infection 3 Asthenia 3 Ocular foreign body 3 Globe contusion 2 Dental 2 Constipation 1