Astronauts are susceptible to a variety of health risks including decompression sickness, barotrauma, immunodeficiencies, loss of bone and muscle, loss of eyesight, orthostatic intolerance, sleep disturbances, and radiation injury.
ˈæstɹənˌɔːts ɑːɹ səsˈɛptᵻbəl tʊ ɐ vɚɹˈaɪəɾi ʌv hˈɛlθ ɹˈɪsks ɪŋklˈuːdɪŋ dˌiːkəmpɹˈɛʃən sˈɪknəs, bˈæɹətɹˌɔːmə, ɪmjˈuːnoʊdfˌɪʃənsiz, lˈɔs ʌv bˈoʊn ænd mˈʌsəl, lˈɔs ʌv ˈaɪsaɪt, ˌɔːɹθəstˈæɾɪk ɪntˈɑːlɚɹəns, slˈiːp dɪstˈɜːbənsᵻz, ænd ɹˌeɪdɪˈeɪʃən ˈɪndʒɚɹi.