National Institute of Allergy and Infectious Diseases head Dr. Anthony Fauci said Thursday on MSNBC’s “All In” that if you were in a setting where you do not know the vaccine status of people, “then you should be wearing a mask.” [cut] Fauci said, “Well, the situation is — and let’s just take a scenario, you have a family setting. You’re vaccinated. Your family members are vaccinated, and even if the children who are yet too young to get vaccinated, go have an enjoyable Thanksgiving in your home. You don’t need to wear a mask.” He continued, “The situation is...