Maine’s Board of Licensure in Medicine voted Tuesday to conduct a deeper investigation into Meryl Nass, of Ellsworth. The board also voted to suspend her license for 30 days unless she agrees to transition to inactive status, Maine Public reported.

Nass is an internist who is active in Children’s Health Defense, a group that agitates against vaccines and vaccine mandates. She did not return a phone call seeking comment on Wednesday.

The medical board has received at least two complaints that Nass was spreading misinformation about the virus. Nass has practiced medicine for decades and in recent years has been increasingly critical about the safety and effectiveness of vaccines, including ones for COVID-19.