Vaccines good or bad? Well, when they're expired, unrefrigerated vaccines sold across China for 5 years, they're probably not good. Local officials in 24 provinces had been using their monopoly on potentially life saving vaccines to make big bucks. When police found out, a year long cover up followed. It's one of the biggest health scandals in Chinese history, and considering the massive melamine tainted toxic milk scandal, that's saying something.