Just several hours before MONSTA X's comeback event on November 7, Starship Entertainment announced that Wonho will not be able to perform due to health concerns. The agency explained Wonho showed symptoms of a cold but after MRI and CT scan, the doctors stated the idol might be suffering from meningitis.

After a more precise examination, the exact diagnosis is now revealed. Starship Entertainment announced, "The final exam results show that he's suffering from severe flu. Full group promotions should be possible starting on their next stage."

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Meanwhile, MONSTA X made their comeback with new album 'The Code'.