User blog comment:Udarsha45/Bleach Takes A Break For 2 Weeks!/@comment-29449108-20120802124137/@comment-1351982-20120802133829

The schedule of a manga-ka is very overwhelming with 18 hour work days, so that's bound to run him down. Also, Kubo has horrible allergies, I think he's probably asthmatic, because people with asthma are more susceptible to sicknesses like pneumonia, which is why he does a lot of excercise in his freetime and generally does not drink or smoke.