Select the statement that correctly describes multiple sclerosis.

a.

this fatal disease leads to severe and progressive memory loss.

b.

this fatal disease attacks the peripheral nervous system.

c.

this nonfatal disease is characterized by severe memory loss.

d.

this nonfatal disease disrupts the central nervous system (cns).

The average adolescent should consume no more than of fat per day.

[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.

Ways to when your friend is going through social isolation?