More than 4,000 people in Denmark may be infected with salmonella in what may become the worst outbreak there in 15 years, health officials said Wednesday.

Urgent checks are being conducted to find the source of a salmonella outbreak that officials say may be caused by a food product distributed only in Denmark but no single source has yet been named

The U.S. government has recommended adding GlaxoSmithKline Plc's Rotarix vaccine to the choices for immunizing infants against the deadly intestinal virus that causes diarrhea and vomiting in children. Rotarix is a liquid and given in a two-dose series to infants from 6 to 24 weeks of age.

The Centers for Disease Control and Prevention's Advisory Committee on Immunization Practices has already endorsed Merck and Co Inc's RotaTeq saying both are equally effective. There are many different strains of rotavirus. The vaccine protects against rotavirus gastroenteritis caused by the G1, G3, G4, and G9 strains

Consumer magazine Which? has found that computer keyboards can be a home to bacteria that may make their user ill.

The germs may cause food poisoning symptoms and stomach upsets

More than 60 people fell ill with norovirus infection Thursday at the Gaylord National Resort and Convention Center in Oxon Hill, Maryland. Several people reported symptoms as they prepared to leave on flights from Washington after attending the medical convention.

Officials received calls about many traveler reporting sick Thursday evening at Reagan National Airport. The travelers had similar symptoms, including nausea. About 65 out of 350 people who attended the conference became ill but returned home safely

Drug maker GlaxoSmithKline announced Thursday that the U.S. Food and Drug Administration (FDA) has approved a vaccine to stop the leading cause of diarrhea in infants. The Rotarix vaccine is primarily used to prevent rotavirus gastroenteritis in infants.

The vaccine will offer protection against the most commonly circulating rotavirus types in the U.S. and allow infants to complete the vaccination series by four months of age. The U.S. Centers for Disease Control and Prevention (CDC) currently recommends that children complete the rotavirus immunization series by six months of age