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‘A lot of people that will go to their grave’ if DeSantis takes no precaution before a vaccine: Dr. Haseltine

04:05

The United Kingdom has become the first country to formally approve the Pfizer and Biontech COVID-19 vaccine. Infectious disease expert Dr. William Haseltine joins Chris Jansing to react to this news and explain what the pharmaceutical companies need to do to receive Americans’ trust.