Skin immunity is a property of skin that allows it to resist infections from pathogens. In addition to providing a passive physical barrier against infection, the skin also contains elements of the innate and adaptive immune systems which allows it to actively fight infections. I hope that this helps.
While all of the above ingredients are in a cigarette, nicotine is the stimulant that causes addiction and dependency.
Because it helps the relationship between the worker and the patient.
Would you feel safer with a muscular man, long hair, tattoos, and piercings. Or an elderly women with gray hair pulled back in a bun with a warm smile.