Parvo is a severe intestinal virus that can cause severe vomiting, diarrhea, dehydration, and death. It is almost always fatal if untreated.
Kennel Cough is an infection of the upper airways (trachea) and sometimes the bronchi of the lungs, caused by several different agents (viruses and bacteria). It is rarely life threatening, and usually responds quite well to antibiotics, cough suppressants, and rest.
If you need more info, let me know.
-Drew
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