[3] Opposition to the bill, albeit from "a tiny minority", has been characterized as "possibly the most strident outpouring of political dissent in recent memory".
[4] Anti-vaccine activists started a petition to have Pan removed by recall election, but failed to obtain the necessary number of voter signatures.
[6][7] Opponents of the legislation vilified Pan on social media, comparing to a Nazi; death threats were reported against both him and Ben Allen.
"[17] The study's correlational analysis also found "that previous geographic patterns of vaccine refusal persisted after the law's implementation.
"[17] In a separate 2019 study published in Pediatrics, Californian public health officials interviewed after SB 277's enactment said that, following the bill's passage, they faced an increasing amount of unusual reasons cited as justifications for medical exemptions, as well as the unethical practices by some physicians who charged parents a high fee in exchange for obtaining an unjustified medical exemption.