Today, the world is free of smallpox, and polio has been eradicated from the Western Hemisphere. Teen smoking declines in Florida. The study also found that current cigar and smokeless tobacco use declined significantly among middle school students for the same period. Since the early 1990's, teen smoking has been increasing in the United States. The decline of teen smoking in Florida between 1998 and 1999 is the largest annual reported decline observed in this nation since 1980.
Malaria is a rare, but potentially serious, complication of blood transfusion in the United States.
This report summarizes three recent cases of Plasmodium falciparum , including two fatal cases, that illustrate the key features of transfusion-transmitted malaria and the importance of accurate donor screening. The FDA, in collaboration with CDC, is currently developing new guidance for blood collection centers, which includes revised guidelines for donor questioning and exclusion that aim to further lower the risk of transmission of malaria by blood transfusion. Vaccination has been one of the 20 th Century's most effective tools for preventing disease and death. The last case of smallpox in the United States was reported in 1949. The last case in the world was reported in 1977.