How long does Communion last?

I’ve tried to research this, and even in the Catechism I don’t believe it says exactly for how long Jesus dwells within a soul after taking Communion. This is something I’ve been wondering about lately, and I don’t know if I can’t find anything on this specifically because it might not be known. I know Jesus is inside of us, from the moment we take the Bread, but I don’t know for how long until His presence, in this literal sense, leaves us.
Thank you for any enlightenment.

Kathryn

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