The West Nile virus has been on the rise, with several deaths being reported across the US and in Europe. In this gallery, ...

For example, they're used to gather information about the pages ... (for instance because you are logged in to the same ...

The paper said that while mass die-offs have been attributed to various factors, including viruses, in many cases, there is no definitive cause.

Researchers at a University of British Columbia lab have discovered a virus 'strongly associated' with mass die-offs of ...

In recent years, doctors and scientists are increasingly studying long-lasting illnesses that begin after someone recovers ...