In Fort Detrick's new BSL-4 laboratory, a labyrinth of ducts guides air in the lab through banks of powerful filters, each of which removes more than 99 percent of particles larger than 0.0003 mm. Staff say air leaves the building cleaner than it arrives.From Popular Mechanics:
This week, the White House released a study by the Working Group on Strengthening the Biosecurity of the United States that recommends stricter guidelines for dangerous pathogens and stronger screening standards for lab employees. But the reception of the proposed changes has been frosty among scientists, who worry that the restrictions will hamper their work, without obstructing terrorism.
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