1.   Should a corporation receive less proportionate punishment for having contaminated its workers with deadly plutonium?

2.   Dailey said she did not know Stevens, and it remains unclear how the bacteria contaminated the three office workers.

3.   Seven workers were contaminated after nuclear research equipment caught fire.

4.   Dr Alfred Saah, of the Jonhs Hopkins Medical Institution, told AFP, the risk that rescue workers could be contaminated by the blood was close to zero.

5.   On Monday six workers were slightly contaminated after radioactive material leaked into the building.

6.   On Sunday, six workers were slightly contaminated after radioactive material leaked into the building.