My understanding is the killed Virus is only safer for the first vaccine ( or round of vaccines?) and that after that the live OPV is safe because the baby should have some active immunity. I have seen the recommendations change over time from OPV, to the killed virus (Salk v Sabin?). I really don’t remember but I looked into all of this when my children were young, and my daughter actually had the injections at my request over the OPV for the reasons you describe. She is 31. But I was also heavily into woo and among a lot of anti vaxxers. I was surprised, when my son, now 15, was immunized, and I wasn’t so woo infected, that actually the standard had changed the the killed virus. But I recall at some point later in his vaccination course they changed to oral. At that point in my life I actually trusted our pediatrician to know more than I did. Horrors.
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