Unless somebody chose to pursue a vaccination afterwards, the answer is yes, you weren't vaccinated prior to 1970, because the vaccine wasn't really there. One of the challenges we had is measles is highly contagious; like, crazy, crazy, super contagious. It spreads very easily. The other challenge is, prior to the vaccine being available, the fatality rate of measles was about one in a thousand individuals who contracted the disease. When you say one in a thousand, it doesn't sound that high, but statistically that is a huge number of individuals dying as a result of measles. Since the vaccine has come in, measles in this country was all but eliminated, except for a few isolated incidents. Now that there is a movement by many people to not get vaccinated, we're seeing these things come back.