Dr. Anthony Fauci, Director of the National Institute of Allergy and Infectious Diseases, joins Marisa and Scott to discuss California's new regional stay-at-home order, the politicization of vaccines and the 'spectacular' advances in their development, and lessons he learned from fighting the HIV/AIDS epidemic. Then, San Francisco Chronicle health reporter Erin Allday joins to discuss the new statewide order and how public health guidance has evolved since the spring.

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