Drug Resistance

LONDON - In a March 18 story about drug-resistant tuberculosis, The Associated Press reported erroneously that there were no U.S.

High rates of the most effective type of malaria-fighting drugs sold in three African countries are poor quality - including nearly half the pills sampled in Senegal - raising fears of increased drug resistance that could wipe out the last weapon left to battle a disease that kills 1 million people each year, according to a U.S.