Angelos Tzortzinis/picture alliance via Getty Images A refugee camp in Greece is under a 14-day quarantine after residents tested positive for the coronavirus. The 20 people initially tested had no symptoms. All 2,700 residents will be tested during the 2-week lockdown, NPR reported. Visit Business Insider's homepage for more stories. The Ritsona refugee camp near Athens was placed on a two-week quarantine after 20 of its 2,700 residents tested positive for the coronavirus, several news agencies reported.