Dimitri was eating at his favorite restaurant and ordered a piece of chicken. His Kayla, was serving him the food and accidently touched the chicken with her bar hands. Dimitri knew Kayla, so he did not care. As he was eating the chicken, he noticed it had gotten cold even though it was fully cooked. The next day he was throwing up and had a fever. He missed school and noticed Kayla posted on Face that she was absent from school because she had the flu. Which category of contamination does Dimitri's illness fall under?