1. After medical internship at measles virus vaccine now used throughout the world. 2. A : Unlike the measles virus , the influenza virus is continually changing. 3. Smallpox and measles viruses are among the oldest that infect humans. 4. Enders and his team went on to culture the measles virus . 5. The measles virus and mumps virus are not the same. 6. Therefore, a vaccine made of the Edmonston strain of measles virus could treat the medulloblastoma. 7. Essentially a weakened form of the wild measles virus , the Edmonston B vaccine is no picnic. 8. Other physicians have also failed to find measles virus in the intestines of other autistic children. 9. The vaccine contains live but weakened measles virus . 10. Measles virus evolved from the then-widespread rinderpest virus most probably between the 11th and 12th centuries.