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Anthony Fauci, Viral Load in Nasopharynx, Breakthrough Infections
Dr. Anthony Fauci stated that vaccinated individuals with breakthrough Delta variant infections carry the same viral load in their nasopharynx as unvaccinated individuals. This data served as the primary justification for the CDC's return to indoor mask recommendations. However, the specific focus on the nasopharynx as a metric for transmissibility has drawn scrutiny from those questioning why other areas like the lungs or mouth are not cited.

