Prem Premsrirut gets her daughter Anya, 9, ready for school at their Las Vegas home Monday, Sep …

Prem Premsrirut gets her daughter Anya, 9, ready for school at their Las Vegas home Monday, Sept. 28, 2020. Premsrirut is a scientist who developed a pool saliva test for diagnosing COVID-19. (K.M. Cannon/Las Vegas Review-Journal) @KMCannonPhoto