Shannon goes to the doctor complaining of symptoms of a sinus infection. She has frequent headaches around her eyes and complains of dizziness. Why would her doctor ask for details of her family medical history if Shannon believes she only has a sinus infection? (1 point) The family history may suggest another cause that should be investigated.

The family history may require other members of her family to be treated as well.

The family history is only for medical insurance issues.

The family history is gathered only when the problem has not been diagnosed.

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?