In other states, a certain number of years of marriage will cause a prenuptial agreement to lapse. In states that have adopted the UPAA (Uniform Premarital Agreement Act), no sunset provision is provided by statute, but one could be privately contracted for. Note that states have different versions of the UPAA.
Some believe that some association can be learned more easily than other associations learned through classical conditioning, this is called biological preparedness. It is believed that these learned associations are evolutionary important in order increase chances of survival of individuals and the species.
a vaccine is a biological preparation that provides active acquired immunity to a particular disease a vaccine typically contains an agent that resembles a disease causing micro organism and is often made from weakened or killed forms of the microbe its toxins or one of its surface proteins