I believe it might be nemonia
Honeypaw dies from Greencough, a fatal sickness that affects cats, in the Warriors series by Erin Hunter.
they are killed by Mapleshades promise I think of greencough
Greencough is a respiratory illness that affects cats in the Warriors book series. It is characterized by symptoms such as coughing, sneezing, and difficulty breathing. Greencough can be fatal if not treated promptly with herbs and care from the medicine cat.
In the Warriors book series by Erin Hunter, BlueStar had greencough. Greencough is a respiratory infection that affects cats in the series, while whitecough is a less severe illness. BlueStar's struggle with greencough is a significant plot point in the series, showcasing her resilience and determination as a leader.
I think Greencough
He died of greencough.
Firestar loses a life to Greencough when he falls ill with the sickness during a harsh leaf-bare. Despite receiving herbs and treatment from ThunderClan's medicine cat, he is unable to fight off the illness, leading to the loss of one of his nine lives.
He died of greencough.
She died of greencough.
Lizardstripe is a ShadowClan queen that died of greencough.
He died shortly after becoming an apprentice. When a greencough outbreak striked, he hot sick, didn't respond to Leafpool's remedies, and died.
Dillusion.