Medical expert on difference between single and multi-dose COVID-19 vaccines

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Published on 25 Feb 2021, 15:20
The FDA could issue emergency approval of Johnson and Johnson's single-dose COVID-19 vaccine as soon as Friday. Meanwhile there's growing evidence of the effectiveness of Pfizer's vaccine in the real world. Dr. Leo Nissola joined CBSN with more on the differences between the single and multi-dose vaccines and efforts to convince uncertain Americans to take them.

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