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:D

hmm... I would worry more about wasps/bees stings than those 2 spiders. :) So far, I can tell you there are no ANY reports about spiders bites that can trigger big problems. I know many physicians and one works in authopsies. He reported to me that there are no deads so far by a bite of a spider, but there are some reports of deads by ONLY one sting of a bee.
Yes, of course any illness people can do suffer more easily any bite/sting, etc.

Allergies will be a worrying thing in XXI century, also the crescent paludism, and maybe resistant-bacteria to antibiotics... :(