1.   A mystery virus is contaminating blood supplies throughout the world.

2.   The Food and Drug Administration has indicated that both Marsam drugs were recalled at least in part because supplies were contaminated with potentially dangerous microbes.

3.   But because the blood was pooled, a single seller with the AIDS virus could contaminate the supply and infect many others.

4.   Flooding caused sewage treatment plants and hog waste lagoons to overflow and contaminate drinking water supplies.

5.   Public waters supplies may become contaminated by floods.

6.   Sewage treatment plants and lagoons of hog waste have overflowed and contaminated drinking water supplies.

7.   The floods closed railroads, destroyed homes, businesses and crops, cut off roads, disrupted postal service and contaminated drinking water supplies.

8.   The rising waters had caused widespread electricity outages and contaminated drinking water supplies.