“Scientists have told Congress again and again that fetal tissue is the gold standard for vaccine research.”

Office of Congressman Jerry Nadler (March 19, 2020). Rep. Nadler Statement Condemning Trump Administration for Refusing to Lift Fetal Tissue Ban for COVID-19 Vaccine Research. Press Release.

https://nadler.house.gov/news/documentsingle.aspx?DocumentID=394222 (accessed June 21, 2020).