Although widespread virus outbreaks may be a thing of the past, the total amount of malicious software being written is on the rise, says McAfee Inc. On Tuesday, the security vendor added the 200 ...

Although widespread virus outbreaks may be a thing of the past, the total amount of malicious software being written is on the rise, according to McAfee.

For some, the prospect of broadening the definition of pandemic-potential viruses was troublesome, especially if it meant roadblocks for research into their possible spread.

The H5N1 bird flu virus has been found in a single sheep in England. This is the first time the virus has been detected in sheep, scientists say, expanding the list of animals that it can infect.

Some experts think there has been a reluctance to document "community spread" of the swine flu virus in countries such as Britain and Spain because it would force the World Health Organization to ...