Early results of environmental tests at CDC labs are negative.
Nine more workers may have been exposed to Bacillus anthracis.
The CDC is monitoring and providing antibiotics to about 75 staffers over Bacillus anthracis concerns.
The World Health Assembly (WHA) again did not decide on when the last laboratory stocks of variola virus, the pathogen that causes smallpox, should be destroyed, Nature reported today on its news blog.
The debate over experiments that increase avian flu virus transmissibility heats up.
The lab, completed in 2008 but held up over challenges, cleared two more obstacles yesterday.
A US-Chinese team of scientists has reported the discovery of three human monoclonal antibodies with a potent ability to neutralize MERS-CoV (Middle East respiratory syndrome coronavirus), a find they say may point the way toward a drug to prevent or treat the infection.
H5N1 avian flu has struck two chicken factory farms in North Korea's capital of Pyongyang, killing more than 46,000 birds, according to a report posted yesterday by the World Organization for Animal Health (OIE).
In the first outbreak, all 46,217 birds died of the disease in three holding pens for layer hens on a farm at the Hadang chicken factory. The outbreak began Mar 21. Samples from the birds tested positive on Mar 26.
Dutch researchers say they've found five mutations that make H5N1 airborne transmissible in ferrets.
Saudi Arabia has reported three more Middle East Respiratory syndrome coronavirus (MERS-CoV) cases, according to a machine-translated Saudi government statement posted on disease-tracking Web sites.
