Scenario 1 - John John is a 25 year old male, he works in an office building as an accountant. One day. John goes
out with his coworkers for lunch at a local deli. He has a chicken salad sandwich, side of fries,
brownie, and sweet tea. 2 days later, John goes to the doctor and reports symptoms of diarrhea,
vomiting, abdominal pain, and fever. John tells the doctor everything he has eaten in the last 4
days, including what he had for lunch from the deli.
What food borne illness might John be suffering from?
What information from the scenario led you to this conclusion?

[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.