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Should we be concerned that COVID-19 vaccine trials were put on pause?

This week two pharmaceutical companies paused their COVID-19 clinical trials over safety concerns about a vaccine candidate and antibody treatment. Johnson & Johnson and Eli Lilly reported participants in the study had adverse reactions. KTVU's Alex Savidge talks with Dr. Peter Chin Hong, an Infectious Disease Specialist at UCSF about whether we should be worried about these pauses.