What are the site of infection of yellow fever?

Which site?: World site: common in south america and in sub-saharan africa(90% infections). Previously in north america. Contact site: between primates, people via the mosquitoes carrying virus organ sites:illness attacks liver, kidneys, bone marrow, heart. Vaccine invented site: in 1927 south african microbiologist max theiler at the rockefeller institute grew cells from a ghana patient; won noble prize.