In a review of more than 250 studies on sexual behavior in people under 25, researchers at the London School of Hygiene and Tropical Medicine discovered that it was social and cultural factors and not any sort of ignorance or unavailability that influenced the use of condoms by young people.

The 14-year study showed that young people assess a potential partner's disease risk, and the need for a condom, by their appearance and extent of social interaction

The Philippines' Environment and Natural Resources Secretary Angelo Reyes on Thursday said the government is declaring war on catfish and "other alien species" that were threatening wildlife and the environment.

In a statement, Reyes says, "Not only are invasive species threatening our agriculture, fisheries and forests, they are also causing major impacts to human health and tourism

On Thursday, health officials reported that two heart transplant patients contracted a parasitic tropical disease before they died earlier this year.

The two men mark the fifth time that patients have contracted the disease while receiving a transplant

A new report indicates that tourists who travel abroad are unaware of the vaccinations required while visiting remote areas, and that they are risking their health by not taking the proper precautions.

According to a study conducted by Direct Line Travel Insurance in the UK, one in six Britons who have been to tropical countries where malaria is prevalent did not taken any anti-malaria pills with them

United Nations officials say that the bird flu is expected to hit the United States within one year.

Dr. David Nabarro, bird flu coordinator of the U.N., says, "It is certainly within the next six to 12 months. And who knows, we've been wrong on other things, it could be earlier