How often a person exercises. the number of times a person engages in moderate to vigorous activity is called?

Sometimes without even knowing it, people waste fresh water. write an editorial for our school newspaper. try to convince your readers that saving and recycling water should be something they do every day.

List the 4 steps for scene assessment (what you do at the very beginning) for an adult

[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.