Disinfectants designed to keep bacteria out of hospitals and homes could effectively train bacteria to become resistant to antibiotics, despite not having previously encountered the drug, according to research published in the January issue of Microbiology.

Health authorities detected 4 cases of influenza A resistant to Tamiflu antiviral, and initiated an investigation to confirm a possible mutation of the virus.

A sperm donor with an undetected genetic heart defect passed on the condition to nine of his 24 children, including one who died at age 2 from heart failure, according to a medical journal report.

So far, 38 were killed by H1N1 virus, and world agencies believe the number of deaths is unusually large considering the total number of infections (1,587).

Health Authorities of Mexico, the United States and Canada detected a new version or mutation of the influenza virus A (H1N1), and they do not discard, that is more aggressive than the current one