Confirmed cases of H1N1 virus passes 800

The number of known swine flu cases worldwide topped 800 on Sunday, with another 66 cases confirmed in the United States, the U.S. Centers for Disease Control and Prevention reported.The number of confirmed U.S. cases jumped from 160 to 226 by Sunday morning, and the number of states with confirmed cases grew from 22 to 30, the CDC reported. Only one U.S. case has been fatal.The latest CDC figures bring the number of confirmed worldwide cases to 853.The World Health Organization reported 787 cases of swine flu, known to scientists as influenza A (H1N1), before the latest U.S. numbers. The WHO said the virus has been confirmed in 17 countries and has contributed to 20 deaths, 19 of them in Mexico.The higher number of cases is a result of ongoing tests on previously collected samples from Mexico, not new reported and confirmed infections, the WHO said.