“It is really important for anyone at risk of contracting mpox complete both doses of the vaccine,” County Public Health Officer Dr. Sayone Thihalolipavan said in a statement. “Completing the series offers the best protection against severe illness, including painful blisters that take a month to heal, and in some cases lead to hospitalization.”

San Diego County has reported 27 mpox cases this year, mostly among people who were not fully vaccinated. All of the cases involved men between 17 and 53 years old.