Hi there,
Are you talking about a whirlpool tub in your bathroom, or a jacuzzi? Jacuzzi's are a no-no, because of how many germs breed in the warm water...Especially those that are in public places like hotels, etc. Not to gross you out, but there have even been reports that show fecal matter found in public jacuzzis. For that reason, nobody in my family uses public jacuzzis anymore.
However, a whirlpool tub in your own bathroom should be fine. You control how it is cleaned, and the water does not sit stagnant in your bathroom for weeks on endlike water in a jacuzzi!
We have a whirpool tub in our master bath and my kids like to put their bathing suits on and play in it. My bathtub is cleaned and disinfected after every use, because I can't stand "tub lines", so I feel pretty confident that it is a safe environment for Andrew.