Morbid Obesity is more of a condition than a disease. You can't
'catch' morbid obesity from someone else. Instead, you inflict it
upon yourself by eating too much and exercising too little.
Morbid obesity is defined as someone having a BMI of greater
than 40. Luckily, it's fairly straightforward to treat. Simply
reduce the calories you eat by having healthier meals and increase
the exercise you do and you'll lose weight fairly rapidly.