Early pandemic efforts to screen international passengers for the coronavirus at U.S. airports were largely “ineffective,” according to a new report published in the Center for Disease Control and Prevention’s Morbidity and Mortality Weekly Report journal.
In January, the CDC and U.S. Department of Homeland Security began a screening program for air passengers arriving from certain countries to reduce the importation of COVID-19 cases into the U.S. A total of 766,044 passengers were screened at 15 airports around the country between Jan. 17 and Sept. 13. Only one case per 85,000 travelers screened was detected.
“The low case detection rate of this resource-intensive program highlighted the need for fundamental change in the U.S. border health strategy,” the report said. It also notes that because transmission of the coronavirus, which causes COVID-19, can happen by asymptomatic carriers and symptoms vary, “symptom-based screening programs are ineffective” and “resource-intensive.”
early epicenter of the virus, at three U.S. airports. Over time, the program expanded to 15 airports and to include all passengers arriving from mainland China, Iran, 26 countries in the European Schengen Area, the United Kingdom, Ireland and Brazil.
The screening consisted of three steps: