Actually, you are way off about shingles. It's PAINFUL for many people, and worse if you are older, even deadly. And it can stay with you for months after the rash has healed. Months. I still feel it in my back from time to time. And shingles can reoccur, and there is no real rhyme or reason why or when. If you've never had chicken pox, you won't get shingles. But once you've had chicken pox, that virus stays with you and settles into your spinal chord and lies dormant, until it flares as shingles. And the vaccine for shingles is VERY expensive which is why insurance companies don't 'recommend' it until 60 and over, even though the vaccine is approved for 50 and older. And a person with shingles is very contagious to anyone who has not had chicken pox nor the vaccine for it.