A 1990 study investigated violent behavior among severely mentally ill individuals in 1,401 randomly selected families who were members of the National Alliance for the Mentally Ill (NAMI). In the preceding year, 11 percent of these individuals were reported to have physically harmed another person.
You can donate after you have finished a course of oral antibiotics for a bacterial or viral infection as long as you have taken the last pill as of the date of donation. If you received an antibiotic by injection, you can donate as long as it has been 10 days since your last injection.
1 You can donate every 28 days, up to 13 times per year. 2  The average donation takes 1 hour and 15 minutes.  If you are a platelet/plasma donor, you can still make regular whole blood or double red cell donations. Both gifts are vital for patients with life threatening diseases.