I did not know that Pfizer had stopped making antivenin (Microbus fulvius) for the Eastern Coral snake. Apparently it’s not worth their time producing the amount required for 15-20 bites per year.* So the FDA reacted by moving the expiration date of the existing vials to 2016/17.
And how about that San Francisco garter snake? It’s amazing – and not very dangerous to humans as it has toxic saliva rather than injectable venom.