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Earlier discussion
1 older comment kept for context.
Oluwaseun Adeyemi
The most common diseases that are non-hereditary are infectious or parasitic diseases. Scabies is not an infection, but an infestation. Tiny mites called Sarcoptes scabiei set up shop in the outer layers of human skin. The skin does not take kindly to the invasion. As the mites burrow and lay eggs inside the skin, the infestation leads to relentless itching and an angry rash.