Facebook Recruitment of Vaccine-Hesitant Canadian Parents: Cross-Sectional Study

Jordan Lee Tustin   ^{1, 2} , MSc, PhD ;   Natasha Sarah Crowcroft   ^{2, 3, 4 *} , MSc, MA (Cantab), MD, PhD, FFPH ;   Dionne Gesink   ^{2 *} , MSc, PhD ;   Ian Johnson   ^{2, 3 *} , MSc, MD, FRCPC ;   Jennifer Keelan   ^{5 *} , MA, PhD ;   Barbara Lachapelle   ^{6 *} , MASc

¹ School of Occuaptional and Public Health, Ryerson University, Toronto, ON, Canada

² Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada

³ Public Health Ontario, Toronto, ON, Canada

⁴ Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada

⁵ Department of Public Health, Concordia University of Edmonton, Edmonton, AB, Canada

⁶ Toronto Public Health, Toronto, ON, Canada

*these authors contributed equally