Which of these are possible symptoms of fetal alcohol syndrome? a. emphysema and birth defects b. cognitive disabilities and copd c. cognitive disabilities and birth defects d. emphysema and copd

Which of the following statements is true caffeine speed up the time it takes to the liver to break down and call taking a shower speed the time it takes to live in a bag and i’ll call

[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.

Complete as many questions as you can.