Most of these 'horror stories' are not true. The chicken pox vaccine is very safe and effective. Just like any vaccine, there might be some mild side effects like soreness at the injection site or a low - grade fever for a short time, but serious problems are extremely rare.
The idea of 'chicken pox vaccine horror stories' is more of a myth than a reality. Yes, every once in a while, a person may have an unexpected reaction to the vaccine. But this is no different from other medications or vaccines. When we look at the overall population that has received the chicken pox vaccine, the number of those who have had any significant problems is minuscule. The benefits of getting vaccinated, such as not getting chicken pox or having a much milder case if exposed, far outweigh the very small risk of any adverse effects.