antibodies when injected in humans. In early 1952 Salk found a few answers. The viruses and the formalin were combined, so for every 250 parts of tissue-culture fluid there was 1 part of formalin. The mixture was allowed to develop for one to three weeks at at temperature of about 34F. After a close study, most members of the NFIP agreed that the vaccine was both safe and effective. On June 12, 1952 Salk went to the Watson Home for Crippled Children near Pittsburgh. He began a series of medical observations, he found that children with at least one type of polio had enough antibodies to ward off additional attacks by the same type of virus. Some children were injected with the vaccine and none showed any ill effects, but their levels of antibodies greatly increased. Soon enough children without polio were given the vaccine, none of them became ill but all were now protected from at least one type of polio.By 1954 Salk had combined the different type vaccines into one vaccine. In 1954 the NFIP sponsored the final test of Salk’s vaccine. Almost two million school aged children were given the vaccine; by the following year it had proved to be safe and effective.Indeed the polio vaccine was a breakthrough in medical science. Because of the work of Jonas Salk and others many people, including children and adults, are living healthy and productive lives because they are polio free. In developed countries it has been nearly eradicated. Annotated BibliographyThe Hall of Science and Exploration: Interview page 1; 1-26-99 *http://www.achievement.org/autodoc/page/sal0bio-1*The interview gave me knowledge of how Dr. Salk thought and felt about what he was doing. It also told me additional information about how he created his vaccine.The Hall of Science and Exploration: Interview page 2; 1-26-99 *http://www.achievement.org/autodoc/page/sal0bio-2*The interview gave me knowledge of how Dr. Salk thought and felt about what he was doing. It also...
