“…51 Three studies included participants ranging from 4-12, 52-54 one study had 4-5 and 11-13 year-olds. 55 Sample size ranged from 22 to 239 participants, eight studies had fewer than 50 participants, 11,30,32,40,46,48,49,54 10 had between 51 to 100 participants, [33][34][35][36]38,42,44,45,52,55 and nine studies had more than 100 participants. 31,37,39,41,43,47,50,51,53 Twelve studies used single vaccinations, 11,31,35,[37][38][39]41,[47][48][49][50][51] ten studies used more than one vaccination, 30,[32][33][34]40,42,43,45,53,…”