The agency said the nasal swab is part of the agency's Traveler-based Genomic Surveillance program (TGS), which launched in 2021 in the wake of the COVID-19 pandemic. The CDC, along with local ...

In the study, Liu and her team analyzed nasal swab samples from over 450 people, including some who later tested positive for COVID-19. They found that those who became infected had higher levels ...