Again, explain to me why there would be a limit ? And answer will reveal itself. The human body has been always been able to adapt to intruders. Whether by evolution or mutation. There is no limit to antidotes.

If you want to know if its lethal if you inject a thousand vaccins whithin 24 hr hours, I assume its very likely.

As there is no limit on microorganisms as they seem to evolve, why should there be a limit on the amount of antidotes ? It just seems impossible, because we only know so little in the grand scope of things. Who knows what type of organisms are released from the ice.