EditorialOmsom samplers, which Kim and Vanessa Pham want sold widely in grocery stores, even if it means placement in the ethnic aisle, in Brooklyn on July 25, 2021. (An Rong Xu/The New York Times)
EditorialWorkers collect wastewater from one of 52 auto samplers around the U.C. San Diego campus used to monitor for possible coronavirus infections, on Dec. 3, 2020. (John Francis Peters/The New York Times)