Dr. Peter Stafford, a U.S. physician who contracted Ebola during a humanitarian mission in the Democratic Republic of Congo, has been discharged from a German hospital after overcoming the disease. Stafford was part of the missionary group Serge when he was infected by the virus.

He was flown to Berlin’s Charité hospital on May 20 for medical treatment. His wife, Rebekah, also a doctor with the group, and their four children were evacuated and quarantined as a precaution, but they never showed symptoms.

Charité hospital, one of Europe’s leading medical centers, provided Stafford with antiviral therapy and other supportive treatments during his stay. The hospital reported a significant decline in his viral load after starting treatment. On May 30, follow-up tests indicated no trace of the virus.

“The initially high viral load decreased substantially under antiviral treatment and supportive care,” Charité stated. “Since May 30, no virus has been detected in the daily follow-up tests. In accordance with internationally accepted criteria-complete absence of symptoms for more than 72 hours and negative virus detection in repeated PCR tests-the competent public health authority lifted the isolation order today at 12:00 PM.”

Dr. Stafford’s family joined him after his release from quarantine. Neither Rebekah nor their children showed any signs of Ebola infection.

The Bundibugyo ebolavirus outbreak in Congo has extended into Uganda and remains a major concern for health officials. The Bundibugyo strain of the virus is less prevalent than the Zaire strain, and options for vaccines or treatments are unavailable.