Pfizer may be the first drugmaker to file for US regulatory authorization for its Covid-19 vaccine, which it says is 95% effective with no serious side effects. This comes right on the heels of news out of Moderna, which says its vaccine also stands at over 94%. With hopes rising that we may see a vaccine in distribution by the end of the year, we speak to Sam Fazeli, Senior Healthcare Analyst at Bloomberg Intelligence, about whether this is truly a cause for excitement.

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