Infectious diseases expert discusses Biden's COVID symptoms, antiviral drug Paxlovid

President Biden tested positive for COVID-19 on Thursday, raising health concerns for the 79-year-old. Nancy Cordes reports with the latest from the White House. Then, Dr. Amesh Adalja, an infectious diseases expert and a senior scholar at the Johns Hopkins Center for Health Security, joins CBS News to discuss the president's diagnosis and treatment.

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