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RHITU CHATTERJEE, BYLINE: About a year ago, when the pandemic hit the United States, Dr. Arghavan Salles was working as a researcher at Stanford University. Salles is a surgeon but wasn't practicing medicine at the time. But seeing the need for more doctors in New York City, she flew there in April of last year to volunteer her time at a hospital working in the ICU.
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CHATTERJEE: Now, remember spring of 2020. It was still the early days of the pandemic. And New York was the first city in the United States to be hit so hard.