[Yelena lifts her shoulders in a shrug.]

If it's poisoned with something that works too fast for me to get an antidote, yes.

[Valek kept every antidote on hand, but there were some like My Love which were so lethal and fast-acting that surviving even with the antidote was up in the air.]

I've learned the taste, smell, appearance, and texture of a hundred poisons native to Ixia and Sitia...give or take. In food and in drink.