William Larsen

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Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program Office plays a key part in helping NASA maintain this important role. The NASA STI Program Office is operated by Langley Research Center, the lead center for NASA's scientific and technical information.(More)
The mammalian 2009 H1N1 influenza strain appears to have a broad host range compared to many influenza strains. Naturally occurring and/or experimental infections have been documented in mice, rats, been observed for some of these species. In addition, it appears that viral shedding of this strain occurs as long as 7–8 days post infection (De Serres et al.,(More)
Responses to patch test substances may occur contemporaneously. Such simultaneous reactions may reflect concomitant sensitization to 2 dissimilar allergens to which concurrent exposure has taken place (e.g., ethylenediamine dihydrochloride and neomycin). It may occur when the individual has been exposed to only 1 of the substances and exhibits a response to(More)
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