Which is the non-contagious disease that is the most common in the world? ?!

Question: Which is the non-contagious disease that is the most common in the world.? .?
Answers:

Tooth Decay!!!..Health Question & Answer

Obesity

or maybe

Stupidity.?Health Question & Answer

diabetesHealth Question & Answer

cancerHealth Question & Answer

dunno this one......for sure......but my guess is....if its not a contagious disease then its Cancer........Health Question & Answer

Cancer or heart diseaseHealth Question & Answer

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Which is the non-contagious disease that is the most common in the world? ?!

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