Nation In New Rochelle, coronavirus patients have been asymptomatic for weeks. They’re still quarantined. March 25, 2020 Joseph Spector and David Propper, New York State Team Comments Off on In New Rochelle, coronavirus patients have been asymptomatic for weeks. They’re still quarantined. About 20 days after their quarantine, New Rochelle residents who tested positive for coronavirus are waiting to be cleared of a quarantine.