Contagion theory is not accepted because too many instances where people become ill regardless of their isolation from human contact.

Question

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Contagion theory states that diseases are caused by the transmission of germs from one person to another. However, there are many instances where people become ill regardless of their isolation from human contact. This suggests that there are other factors, besides contagion, that can cause disease.

Contagion Theory Is Not Accepted Because Too Many Instances Where