I love this girl right and we've been through alot and have been on and off for almost 2 years and im still shy around her and she acts the same way towards me i just dont know what to do can some one please give me advise

[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.

What are 3 important public health tools for addressing flu outbreaks and why

Astage in life where you begin to develop more adult-like characteristics is called