At least eight of the sites are thought to be contaminated with radioactivity from luminous paint that was once used in military compasses and instrument panels. Many firing ranges are littered with dangerous unexploded munitions.
Inimesed, kellel on olnud nädalaid enne vere loovutamist mingi nakkuslik mao - ja soolehaigus, võivad mõnikord kanda edasi seda organismi, mis võib vereülekande jaoks säilitatavas veres tohutult paljuneda.