24. An example of a Chemical hazard is: O A. A cell phone laying on atood prep table
O B. Not rinsing a prep table after it was wiped down with sanitizer solution
OC. A food handler sneezing onto ready-to-eat food
OD. A bleach container that spills onto a food prep table

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

Some infants in poorer households are not fed this important food for all babies. what is it? a. baby food b. breast milk or infant formula c. water. d. all of the choices are correct

You which of the following statements is true? muscle tremors are an early symptoms of alzheimer's disease. type 2 diabetes is hereditary and cannot be prevented. certain medications can cure als and parkinson's disease. exercise is a natural way to relieve pain and stress.