For example, we found that physicians really don't do a good job being able to distinguish the clinical markers of the rash for chickenpox and smallpox, ... They also had problems with distinguishing a patient's presenting with an attack of botulism from other illnesses.

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The risk of spread goes up logarithmically.

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The things we read in scary stories are just using our imaginations to evoke a feeling. And sometimes that feeling is happiness or sometimes that feeling is surprise and sometimes that feeling is the spooky scary feelings of Halloween.

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We think that's because the clinical marker, specifically the widening of the chest, is something we have all been attuned to since the anthrax attack of 2001.

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