“…Items were categorized as “vaccine acceptability” if they included the word “would,” as in “ Would you agree to vaccination …” or “ Would you accept the vaccine …” Of 31 (39%) studies that measured this construct, 21 measured parental acceptability of the vaccine for daughters [5, 7, 8, 12, 15, 25, 34, 38, 39, 44, 53, 58, 60, 61, 80–86]. Eighteen measured acceptability for oneself [7, 9, 10, 12, 25, 34–36, 38, 48, 50, 61, 78, 80, 84, 85, 87, 88], and five inquired about the acceptability of vaccinating sons [60, 61, 74, 80, 84].…”