Michael Barbour is an expert on virtual education and a professor at Touro University California.

Dorit Rubinstein Reiss is a professor at the University of California, Hastings College of the Law. Reiss is an expert on vaccines and the law.

Robert McElroy is the bishop of the Roman Catholic Diocese of San Diego. He issued a letter instructing priests in his diocese to decline to issue vaccine exemptions. Aida Bustos is the media contact.

Greg Fairrington founded and leads Destiny Christian Church in Rocklin, California, with his wife. He has offered to issue religious exemptions for vaccination requirements.

Aradhna Tripati is a professor of atmospheric and oceanic sciences at University of California, Los Angeles, as well as director of the Center for Diverse Leadership in Science. Her areas of expertise include climate change, environmental justice and paleoclimatology.

Beth Rose Middleton Manning is a professor of Native American studies at the University of California, Davis. She can discuss rural environmental justice and Indigenous analyses of climate change.

Adam Winkler is a professor at UCLA Law School. He is an expert on the Supreme Court.

Franita Tolson is a law professor at the University of Southern California and an expert in constitutional law, voting rights, redistricting and election law.

Nathaniel Persily is a law professor at Stanford Law School. He is an expert in American election law, including voting rights, redistricting and election administration.