“…Ten studies used randomized control designs [16, 45, 46, 49, 50, 53, 54, 64, 64, 65], eight studies used prospective cohort designs [44, 47, 48, 51, 52, 56–58], two retrospective cohort studies [62, 63], two cross sectional studies [59, 61] and one case control study [55] ( Supplementary material: Table 1 ). Eleven studies included mRNA vaccines among which BNT162b2 mRNA, Vaccine, mRNA-1273 (100 g) administered intramuscularly (IM) as a series of two doses (0.5 μmL each), given 28 days apart [44, 47, 48, 50, 51, 53, 55, 58, 60, 63, 64], six studies included inactivated vaccines μg/0.5 mL) or Sinovac (0.5 μml) given intramuscularly [52, 54, 56, 59, 61, 64], seven studies included viral vector vaccines among which ChAdOx1 nCoV-19 with two doses (5 × 1010 vp) was given 4-6 weeks apart, Ad26.COV2.S [16, 45, 49, 51, 57, 62, 63] and two study included sub unit g (sub unit) of recombinant spike protein with 50μg of Matrix-M1 adjuvant) administered two intramuscular injections, 21 days apart and two standard doses of 15 mcg MVC-COV1901, administered 28 days apart via IM injection [46, 65] ( Supplementary material: Table 1 )…”