HELP ASAR Why are individuals in many developing countries susceptible to diseases such as polio and pertussis? A. because of poor hygiene
B. because of genetic variation
C. because of a lack of vaccination
D. because of a lack of education

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.