Jessica is helping a friend dislodge a piece of meat from her throat. She delivers five blows on her friend’s back with her fist and then gives him five abdominal thrusts. Is Jessica doing the procedure correctly?

No, she should use the heel of her hand for the blows.
No, she should use the side of her hand for the blows.
No, she should use her elbows to deliver the blows.
No, she should use a tennis ball to deliver the blows.

[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.

Jessica is a friend dislodge a piece of meat from her throat. she delivers five blows on her friend’s back with her fist and then gives him five abdominal thrusts. is jessica doing the procedure correctly? 1 no, she should use the heel of her hand for the blows. 2 no, she should use the side of her hand for the blows. 3 no, she should use her elbows to deliver the blows. 4 no, she should use a tennis ball to deliver the blows.

Iused st ives green tea face scrub and washed it off, but i got a tiny taste of something when i licked my lips 30-60 seconds later? it's not likely that i actually swallowed anything, right? or that this will make me sick?