A vaccine for malaria

Years in development, a vaccine that is more than 75% effective in preventing the contraction of malaria was approved on Monday by the World Health Organization. Host Marco Werman speaks with Sir Adrian Hill, director of the Jenner Institute and Lakshmi Mittal and family professor of vaccinology at the University of Oxford, about his work on the R21/Matrix-M vaccine, which is expected to save millions of lives. 

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