Comment by Kathrin Summermatter

We still do not know for certain where SARS-CoV-2 comes from, but much points to an animal origin. We came to this assessment by evaluating scientific studies that, for example, made genetic comparisons with coronaviruses from animals. We also rely on the analysis of early infection cases and on conversations with experts. Alternative hypotheses such as a lab origin were also examined. Taken together, these different sources yield the overall picture that SARS-CoV-2 most likely jumped from animals to humans.