1 2 , ▁the ▁population ▁ ▁was ▁estimated ▁at ▁ 4 0 6 , 4 0 0 . ▁ ▁Econom ic ▁activities ▁The ▁economy ▁of ▁Am uria ▁District ▁is ▁based ▁on ▁two ▁main ▁activities : ▁subs istence ▁agricult ure ▁and ▁animal ▁husband ry . ▁Over ▁ 9 0 ▁percent ▁of ▁the ▁population ▁eng age ▁in ▁either ▁or ▁both ▁activities . ▁ ▁Prom inent ▁person ▁Dr . ▁Peter ▁E ri ki , ▁World - class ▁Phys ician . ▁Work ed ▁for ▁the ▁World ▁Health ▁Organ ization ▁( ▁W HO ) ▁at ▁its ▁headquarters ▁in ▁Gene va , ▁Switzerland , ▁W HO ▁Africa ▁headquarters ▁( ▁W HO ▁AF RO ). ▁Dr . ▁E ri ki ▁was ▁W HO ▁Country ▁Res ident ▁Represent ative ▁( Res ▁Rep ), ▁for ▁Ang ola , ▁Ken ya ▁and ▁later ▁Niger ia ▁- ▁the ▁most ▁popul ous ▁country ▁in ▁Africa . ▁Dr . ▁E ri ki ▁previously ▁also ▁worked ▁as ▁head ▁of ▁the ▁U g anda ▁National ▁T uber cul osis ▁and ▁Le pro s y ▁control ▁program ▁and ▁as ▁Cons ult ant ▁Ch est ▁Phys ician ▁at ▁Mul ago ▁National ▁refer ral ▁hospital ▁in ▁U g anda . ▁Dr . ▁E ri ki ▁is ▁a ▁gradu ate ▁of ▁M aker ere ▁University ▁Medical ▁School ▁( MB ▁Ch B , ▁and ▁M Med ) ▁in ▁U g anda , ▁and ▁Harvard ▁University ▁in ▁the ▁United ▁States ▁of ▁America ▁( USA ). ▁Je je ▁Od ongo , ▁a ▁full ▁general ▁and ▁politician , ▁served ▁as ▁an ▁Army ▁Commander ▁of ▁the ▁U