What do systematic reviews say?

IPV‐OPV vs OPV

IPV‐OPV showed no clear difference in serious adverse events (classified by MedDRA) (Range of compared with OPV (low certainty).

• Sequential inactivated (IPV) and live oral (OPV) poliovirus vaccines for preventing poliomyelitis 2019 · Cochrane Headline outcomes only
  RR 0.88 [0.46, 1.7]
  4 studies · 1948 participants
  Low