The respiratory illness causes pneumonia, can attack the kidneys and other organs.

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The dogs were clinically dead, with no heartbeat, respiratory functions, or brain activity, but their tissues and organs were perfectly preserved because the procedure lowers the body temperature to about 50 degrees F.

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They can irritate the eyes, skin and respiratory system and cause vomiting, diarrhea, tremors, convulsions and permanent damage to internal organs.

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