Ray of Sickness
You shoot a greenish ray at a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 2d8 Poison damage and has the Poisoned condition until the end of your next turn.
Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 1.
Ray of Sickness 5.5e 2024 vs. 5e 2014 edition differences
Both versions deal 2d8 poison damage on hit, with damage increasing by 1d8 per slot level above 1st. The 2024 version explicitly states the target "has the Poisoned condition" until the end of your next turn, while the 2014 version states the target "is also poisoned." The wording change clarifies the condition application.