Its more that if you get bitten without the inoculations, you need a lot more jabs into the bite. Tbh, if you can get innoculated, do it. Dog bites are rare on tcr, but rabies isn't a half arsed thing, it'll kill you. In the uk inoculations is with dead strain, so it won't make you feel ill or anything. But with you low white count, double check.
I'd take pepperspray, rather than iodine. I have and used it.