Listed below are the figures for medical disasters.

30% Incidence of adverse drug event in hospitalized patients.
(Anderson, 1992)
10% Incidence of psychosis due to corticosteroid therapy.
(Havey, 1984)
7-10% Incidence of hepatitis due to blood transfusion.
(Stehling, 1986)
6.1% Incidence of infection in postoperative orthopedic patients.
(Fernandez et al., 1992)
3.76% Incidence of nosocomial infection in hospitalized patients in the U.S.A. (C.D.C., 1991)
1-2% Incidence of paralysis due to neurosurgery of the cervical spine.
(Rocha vs. Harris, 1987)
0.7% Incidence of esophageal perforation during anterior approach cervical spine surgery.   (Van Berge Henegouwan et al., 1991)
0.3-0.9% Incidence of death due to cervical spine surgery.
(Graham, 1989)
0.25-0.75% Risk considered remote as a matter of law, according to Washington state judicial opinion. (Mason vs. Ellsworth, 1970)
[Note: The risk of stroke due to chiropractic cervical adjustments is so remote that informing patients is not required, according to California Superior Court judicial opinion. (Joarns vs. Ross, 1993)]
0.057% Incidence of seizure due to D.P.T vaccine.
(C.D.C., 1994)
0.012% Incidence of breast cancer due to mammography.
(Bushong, 1984)
0.005-0.015% Incidence of death from radiation-induced malignancy due to x-ray exposure of 1 R.A.D.
(Bushong, 1984)
0.00025-0.01% Incidence of death due to radiocontrast media.
(Atkinson & Kaliner)
0.0008-0.001% Incidence of death due to allergic reaction to anesthetic agents.
(Anderson, 1992)
0.00002-0.00008% Incidence of death due to lightning in the U.S.A.
(Eriksson & Ornehult, 1998)
0.00001-0.0003% Incidence of serious neural complications due to cervical manipulation. (Cyriax, 1978, and Gutman, 1983, respectively)