Do question no5 plz
and 7​

[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.

Which is shown to be an effective treatment for depression?

Match the job descriptions with the job titles. emt hospital patient account representative meeting planner concierge plan and coordinate business events for clients. arrowright determine the treatment plan for people with injuries. arrowright perform housekeeping tasks for guests in hotels. arrowright review patient records and make sure that the information is secure. arrowright