Question: "Look, the chicken pox vaccine comes with some risks. The chicken pox vaccine is a live attenuated vaccine. It can cause a mild case of the...

Question:

"Look, the chicken pox vaccine comes with some risks. The chicken pox vaccine is a live attenuated vaccine. It can cause a mild case of the chicken pox or shingles. Plus, it's not necessary. As long as everyone else at work has had chicken pox or has been vaccinated, I don't need to be vaccinated. And I don't like needles or doctors," said Sam.

"But, Sam," replied Dakota, "What if everyone or even just a third of the population followed your example? Then there would be no risk. In addition, chicken pox is a very different disease in adults. The rash is usually more widespread, the fever lasts longer, and complications are more common. And if a pregnant women gets chicken pox, a lot of really nasty things can happen to her baby. I know it takes two shots, I know you don't want to spend the money, and I know you hate shots. But you really ought to get vaccinated, for yourself and for the other people here at work."

Q: What are the external effects of a vaccine?