We tackle your biggest questions about immunity: If you have it, how long does it last? Can you be infected twice? What does "herd immunity" mean? Plus, Gabrielle Union on handling the new normal, PTSD, motherhood, and her new passion.

Want to know how to look marvelous without splurging so much? Dr. Oz invites three beauty experts to share the smartest ways to save money while looking fabulous starting from your hair and makeup tools to the beauty products you use.

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