Drop in virus testing worries health experts Jenna Portnoy and Rachel Chason, The Washington Post Feb. 28, 2021 FacebookTwitterEmail A sign advertises drive-through coronavirus testing in Herndon, Va., in November. Coronavirus testing is down from peak levels over the winter holidays, making public health experts concerned that crucial information about the pandemic will be missed.Washington Post photo by Jahi Chikwendiu Coronavirus testing is down by at least a third from its peak during the winter holidays in the greater Washington, D.C., region, sparking concern among public health experts who worry that lower testing numbers mean officials could be late to recognize a future surge in cases or the next vaccine-resistant variant.