This is a puzzle about word transformations. Each symptom clues a different transformation which can be applied to exactly one of the 8 words for each patient and produce a valid word. Once we're done assigning symptoms to words, we're left with three words: "CATCH", "DISEASE", and "EIGHT". This is a cluephrase for the answer, indicating that the answer is a eight-letter word that means "Catch disease".
Chills: Prepend COLD. | COLD BLOOD | COLD SHOULDER | COLD SWEAT |
Dehydration: Remove HHO. | THUMBHOLE | THOUGH | HOARHOUND |
Dizziness: Reverse the word. | DESSERTS → STRESSED | DELIVER → REVILED | REGAL → LAGER |
Drowsiness: Add a Z. | QUARTZ | CZAR | ZONE |
Flushed Skin: Make it red. | BLACKBERRY → RASPBERRY | EMERALD → RUBY | VIOLETS → ROSES |
Stuttering: Duplicate a letter. | LATTE | CORRAL | SCARRED |
Voice Loss: Remove all vowels. | CRAYPOT | SCARY | STAY |
Remaining Words: | CATCH | DISEASE | EIGHT |