Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questio Online Content: Site 1 Fitness Log How can exposure to air pollution be reduced indoors and outdoors? (Site 1)

Which statement is most correct about self esteem?

Sally goes jogging every morning she also enjoys playing tennis and baseball identify the lifestyle that sally maintains

[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.