Which of the following is not a good exercise for the lower body? a. hip flexor b. spine stretch c. calf stretch d. hamstring stretch

Achild was brought to the hospital with complaints of fever. the vital signs of the child show a temperature of 102° f. on diagnosis, the child is found to have developed exanthema subitum. which drug administered to the child with this communicable disease reduces the body temperature?

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

[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.