Not necessarily sickness, but I don't know what other word I would have used.

• Mumps.
• Head lice.
• Bee sting.
• Poison ivy.
• Chicken pox.
• Strep throat.
• Measles.
• Tonsillitis.
• Bladder infection.
• Mersa.

BONUS.

• I still have my tonsils, appendix, and wisdom teeth.