In clinical trials, the pharmaceutical company Johnson and Johnson says its single-shot coronavirus vaccine has been proven effective in preventing serious illness. This comes as a new variant of the virus has arisen in the U.S., originally seen in South Africa. Mola Lenghi reports from CBS News, and Dr. Annette Reboli of Rowan University’s Cooper Medical School joins Tanya Rivero of CBSN to discuss the latest developments.
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