Always check for sources. Believing in random unproven Sgulos may be an Issur D’oraysa, as per the Rambam.
Doing anything dangerous is an Issur D’oraysa as well. Taking risks to one’s or one’s charges’ lives are unacceptable in Judaism.
As far as nurses, as long as they are dressed properly (as is your responsibility as a Jewish mother), why would they pose an issue to his neshama?