Which of the following effects of smoking is an individual least likely to experience from secondhand smoke?
a a change in senses
b. a change in physical appearance
yellowing teeth
d. a change in physical ability
c
select the best answer from the choices provided.

Plan 1 (name) plan 2 (name) monthly premium yearly deductible number of doctor visits copay for doctor visit

Which two levels of the spine that can undergo flexion and extension?

[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.