Epidemiology is part of what function of public health

Which behavior is an example of poor self esteem

Does indrect sunlight does not pose any danger to the skin

Insulin is a peptide therapeutic used to manage type 1 diabetes, which affects more than 20 million people worldwide according to the international diabetes federation. a significant limitation to the broad distribution and use of insulin to treat type 1 diabetes is the fact that it must be administered by injection rather than orally. why is insulin administered by injection and not orally?