Two DNA defense systems behind resilience of 7th cholera pandemic

Cholera is caused by the bacterium Vibrio cholerae, a waterborne pathogen that infects the gut of humans through contaminated water and food. When ingested, V. cholerae colonizes the gut's inner surface, causing a watery ...

Killer flu virus threat over-hyped: Dutch scientist

A top Dutch scientist heading a team which created a mutant killer flu virus Wednesday said the threat to global biosecurity is being overplayed, even if full research results are published.

Details of lab-made bird flu won't be revealed (Update)

The U.S. government paid scientists to figure out how the deadly bird flu virus might mutate to become a bigger threat to people - and two labs succeeded in creating new strains that are easier to spread.

Why do some influenza virus subtypes die out?

Every so often we hear about a new strain of influenza virus which has appeared and in some cases may sweep across the globe in a pandemic, much as the H1N1 virus did last year. What happens to the old seasonal viruses? In ...

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