Cigarettes irritate the throat. When a user becomes used to this irritation, and hardly notice it anymore, this is an example of . * relapse
tolerance
withdrawal

Which can be an effective way to reduce stress? getting in the habit of doing things perfectly the first time engaging in a fun physical activity on a regular basis taking an antacid for a stress-based stomachache studying extra hard the night before a test

[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.

Antibiotics are given when an std is caused by a virus. true or false