Infectious avian flu strain hits the Western Cape
CapeNature might have to close affected bird reserves if the outbreak becomes too severe
H5N1
Virus research triggers fear
Scientists are at odds over tests that some say could be used to make a biological weapon.
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US pleads to keep bird flu studies secret
The US has asked <em>Nature</em> and <em>Science</em> to censor data on a lab-made version of bird flu that could spread more easily to humans.
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WHO declares first 21st century flu pandemic
The World Health Organisation declared an influenza pandemic on Thursday and advised governments to prepare for a long-term battle.
