SPIKE IN MENTAL HEALTH CONCERNS HAS EPIDEMIOLOGISTS WORRIED.

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"There's no doubt about it," said a spokesperson from Mount Sinai Hospital.

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"Hospitals over the US are overwhelmed with an increase in psychiatrically-related violent behavior such as explosivity and aggressive paranoia.

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The most likely cause is a new street drug; we have yet to identify any commonality between the affected people."

Dr. Andrew Morton, a Harvard epidemiologist, has a different opinion.

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"These people aren't drug users.

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They're coming from all walks of life.

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Sure, there's a predilection for people who already have some mental illness, but we're seeing perfectly normal people suddenly presenting with violent explosive behavior.

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I think the most likely cause is infectious: no other pattern would fit this widespread an outbreak."