Yeast cells were grown in large numbers with this plasmid inside, they expressed the plasmid and so you made Hepatitis B surface antigen not in people but in cell culture where it was not normally formed.
The controversy arose in early 2012, when reports began to surface that newly formed tea-party and other conservative groups that had applied for tax-exempt status were receiving letters from the IRS asking for disclosure of their donors and other information that typically isn't requested of groups making such applications.
Detailed studies of the surface indicate that these were formed by a lake caused by the flow of underground water that periodically made its way to the bottom of the crater.