“Contact tracing in New York is not up to par and long delays in test results have jeopardized the ability to use them to stop the spread, but there are serious cultural challenges as well, with American’s concept of individual liberties. In South Korea, there is strict adherence to quarantine. Once someone tests positive, they are moved into a quarantine facility. That’s very different than telling people to stay at home or making facilities available like we’ve done here,” said Professor Carri Chan, an expert in health care operations management who teaches at Columbia University.