Young adults are volunteering to get COVID-19—for science - National Geographic

SARS-CoV-2 "challenge trials" can help scientists better understand the immune system's response to the virus, which could yield improved vaccines and treatments.

Paul Zimmer-Harwood enjoys taking on extreme challenges. In 2016, when he was 24 years old, he swam 18 hours to complete a 26-mile marathon in a swimming pool in Gütersloh, Germany. In 2019, he compl… [+912 chars]

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