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Dr. Mercedes Carnethon stresses 'reinforcing the basic messages' to stop Covid transmission

05:03

Dr. Mercedes Carnethon, vice chair of preventive medicine at Northwestern University, stressed the importance of "reinforcing the basic messages" in order to prevent the spread of Covid-19. She also advised that "we can be fairly confident" the variant of Covid-19 first detected in the United Kingdom is "everywhere" in the United States.