Radiation Poisoning (5e Disease)
From D&D Wiki
Contracting Radiation Poisoning
A person begins to contract radiation poisoning after spending 10 minutes in a weak radiation field, or 2 minutes in a strong radiation field.
Stage 1: For every day someone is afflicted with radiation poisoning, they will not be able to eat or drink, and will be unable to heal by any means other than magical.
Stage 2: If a person is continuously exposed to radiation even after contracting radiation poisoning, their body will begin to break and shut down, crippling them, and after another 7 days, killing them.
Radiation Poisoning can be cured with Anti-Radiation pills or medicines, or heal used at the 6th spell slot or higher.