Which statement by a parent indicates the need for further teaching about nutrition in preschoolers?

Smoking cigarettes is a pervasive habit found in many parts of the world and a habit that could be explained by both microsociological and macrosociological forces. give an example of each that would be relevant to explaining the proliferation of smoking. how might your suggested micro- and macro-level analyses be linked

How can lung cancer best be prevented? a. by getting regular screeningsc) b. by avoiding cigarette smokec. by monitoring cholesterol levelsd. by avoiding nown allergensherrwww

[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.