Nikki Vars McCullough

Q&A: Mask Nerd Interviews 3M's Nikki Vars McCullough on the Science of N95s, Masks

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Aaron Collins, an engineer who tests masks and has gained a YouTube following as “Mask Nerd,” sat down with Nikki McCullough, vice president in 3M’s personal safety division, to learn about the science behind 3M N95 respirators and other masks.

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