With the errata change, the first benefit for Chirurgeon (P73) is now "You start with the formula for two of the following in your formula book, in addition to your other formulas: lesser antidote, lesser antiplague, or minor elixer of life."
A Basic Crafter's Book can be bought for 1 sp and says "This book contains the formulas for Crafting the common items in this chapter" (p287). Page 245 further clarifies this: "You can gain access to the formulas for all common items in Chapter 6: Equipment by purchasing a basic crafter's book". Based on this, it seems clear that this includes all 3 of the choices above. Lesser antidote, lesser antiplague, or minor elixer of life are all formulas in chapter 6.
So assuming your GM makes a Basic Crafter's Book available for your characters during character generation, the first benefit from being a Chirurgeon is not terribly useful. Maybe that's the point, that Chirurgeons can still gain them even if the GM does not make Basic Crafter's Books available. Or am I missing something here?