SF News UCSF Doctor 'Persistently Positive' For COVID-19 After Three Months 66-year-old UCSF medical director Dr. Coleen Kivlahan is one of 60 UCSF medical professionals who have been infected with the SARS-CoV-2 coronavirus, but she's the only one who has not recovered and who continues to test positive for the virus nearly 90 days after she believes she caught it.