Covid-19 Survivors Who Test Positive Again Aren't Infectious: Study

Greetings, QuickTake readers! In this edition: Trump defends regular hydroxychloroquine use, Brazil jumps to global No. 3 in virus cases and CO2 emissions register biggest drop yet.

Patients who test positive for the coronavirus after fully recovering don't transmit the virus and may have antibodies that prevent them from falling sick again, research from South Korea shows. In a study of 285 Covid-19 survivors who retested positive, scientists from the Korean CDC found that none of them were spreading any lingering infection, and concluded a two-week quarantine was unnecessary in such cases.