Comment by Lauren Schneider

A recent World Health Organization report presents the newest findings on the origins of COVID-19 from the Scientific Advisory Group for the Origins of Novel Pathogens (SAGO), an international body of more than 24 independent scientists. Drawing from peer-reviewed studies, expert briefings, and unpublished data, the report concluded that zoonotic spillover was the most likely cause of the outbreak. However, the report does not eliminate the possibility of a laboratory incident because Chinese officials did not respond to the panel’s requests for information about research activities and biosafety procedures in Wuhan laboratories.