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Zambia has not yet received any vaccines

While more than 60 million vaccine doses have been administered in the U.S., the country of Zambia has not yet received any vaccines. According to international vaccine equity initiative COVAX, unchecked infection anywhere in the world may give rise to further mutations that threaten health globally. CIDRZ lead laboratory scientist Michelo Simuyandi joins CBSN AM on the phone from Lusaka, Zambia, to talk about the situation in Sub-Saharan Africa.

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Biden ramps up COVID vaccine production

To help ramp up vaccination efforts, the pharmaceutical company Merck has agreed to help mass-produce Johnson and Johnson's single-dose coronavirus vaccine. President Biden now says there will be enough doses for every adult in the country by the end of May. CBS News correspondent Janet Shamlian reports from Houston, and Dr. Dara Kass, an ER doctor and medical contributor for Yahoo News, joins CBSN's Elaine Quijano to discuss the latest.

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50 million COVID shots administered since Biden inauguration

The Biden administration is marking a new milestone in the fight against the coronavirus pandemic. The U.S. has administered 50 million of its promised 100 million vaccine doses in just five weeks. This comes as homegrown variants cause alarm on both coasts on the country. Dr. Richard Besser, the president and CEO of the Robert Wood Johnson Foundation and the former acting director of the CDC, joins CBSN to discuss the latest.

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