I have illnesses set to Vanquisher level - and this could be tied to the Markets not functioning properly - but I have a surplus of fruits/berries in both the markets, root cellars, and there are even preserves available for both fruit & vegetables.
But my villagers are constantly getting scurvy and some even die from it (side note: my town has two fully operational hospitals).
its annoying because basically when the food sources are available but most like might not have been available in the root cellar the villager went to or the market at the time he was “seeking food” so they didn’t get their fruit or veggies… its kinda annoying… but the market atm is annoying to begin with