Why does inoculating with cowpox protect against smallpox but a standard flu vaccine cannot protect against every flu strain

Smoking cigarettes is a pervasive habit found in many parts of the world and a habit that could be explained by both microsociological and macrosociological forces. give an example of each that would be relevant to explaining the proliferation of smoking. how might your suggested micro- and macro-level analyses be linked

The characteristic of stress responses that refers to the degree or extent of the behavior is a. intensity. b. frequency. c. duration. d. stress.

Describe the potential effects, on people, of unprotected exposure to the sun.give an example of 1 new thing have you learned about the sun’s uv rays.