The Search for Cancer Viruses (NET Science and USPHS, 1966)
This Net Science film begins by introducing a child named Sandra with leukemia and following her as she gets routine blood work done. The narrator then explains that scientists are seeking to prove that a virus is the cause of cancer in humans. Doctors Grace and Stuart are called upon to help explain the present knowledge. The narrator explains that cancer is a disease of the cells, and then gives a brief description of cells, and shows through time-lapse photography how normal cells and cancerous cells reproduce differently under a microscope.