Ex 2.19  Insert the vowels (a, e, i, o, u)

T h _ W _ rld H _ _ lth _ r g _ n _ s _ t _ _ n (WH _ ) h _ s w _ r n _ d th _ t t h _ Z_ k _ v _ r _ s _ _ tbr _ _ k _ n L _ t _ n _ m _ r _ c _ c _ _ ld t _ rn _ n t _ _ g l _ b _ l p _ n d _ m _ c. M _ ny sc _ _ n t _ sts s _ y th _ _ _ tbr _ _ k c _ _ ld b _ m _ r _ s _ r ___ s th _ n th _ _ b _ l _ v _ r _ s. _ b _ l _ k _ l l _ d _ v _ r 11,000 p _ _ p l _ _ n W _ st _ f r _ c _ _ n 2014 _ nd 2015. Th _ W H _ _ s t _ m _ t _ d th _ t th _ Z_ k _ v _ r _ s c _ _ ld _ n f _ ct f _ _ r m _ l l _ _ n p _ _ p l _ by th _ _ nd _ f 2016. Th _ v _ r _ s h _ s b _ _ n _ d v _ n c _ ng _ c r _ ss S_ _ th _ nd C_ ntr _ l _ m _ r _ c _ _ n th _ p _ st y _ _ r. Dr M _ r g _ r _ t Ch _ n , D _ r _ c t _ r - G _ n _ r _ l _ f th _ W H _ , w _ r n _ d th _ t Z_ k _ _ s "spr _ _ d _ ng _ xpl _ s _ v _ ly". Sh _ _ d d _ d th _ t _ t h _ s q _ _ ckly g _ n _ f r _ m b _ _ ng _ m _ ld thr _ _ t t _ b _ _ ng f r _ ght _ n _ ng. W _ r m _ r w _ _ t h _ r m _ _ ns th _ m _ s q _ _ t _ t h _ t c _ r r _ _ s th _ v _ r _ s _ s _ l s _ spr _ _ d _ ng w _ rldw _ d _ . T h _ Z_ k _ v _ r _ s _ s l _ n k _ d t _ _ l _ r g _ r _ s _ _ n b _ rth d _ f _ cts _ n Br _ z _ l _ nd s _ r r _ _ n d _ ng c _ _ ntr _ _ s. _ n p _ r t _ c _ l _ r, sc _ _ n t _ sts s _ y _ t c _ _ s _ s _ n  r l g c l _d f ct_ c _ l l _ d m _ c r _ c _ p h _ ly. Th _ s _ s wh _ r _ _ b _ by _ s b _ rn w _ th _ s m _ l l _ r h _ _ d th _ n n _ r m _ l, _ nd w _ th br _ _ n d _ m _ g _ . H _ _ lth _ f f _ c _ _ ls _ n Br _ z _ l r _ p _ r t _ d th _ t _ r _ _ nd 4,000 b _ b _ _ s w _ r _ b _ rn w _ th m _ c r _ c _ p h _ ly l _ st y _ _ r. Th _ s c _ m p _ r _ s t _ f _ w _ r th _ n 150 c _ s _ s _ n 2014. Th _ C_ l _ m b _ _ n g _ v _ rnm _ nt h _ s j _ st r _ p _ r t _ d th _ t m _ r _ t h _ n 2,100 pr _ g n _ nt w _ m _ n _ n C_ l _ m b _ _ _ r _ _ n f _ c t _ d w _ th th _ v _ r _ s. Th _ r _ _ s n _ v _ c c _ n _ f _ r Z_ k _ _ nd _ t w _ ll b _ d _ f f _ c _ lt t _ f _ nd _ n _ . _ d _ c t _ r s _ _ d _ v _ c c _ n _ w _ _ ld h _ v _ t _ b _ t _ s t _ d _ n pr _ g n _ nt w _ m _ n, _ nd th _ t w _ _ ld b _ " _ p r _ c t _ c _ l _ nd _ t h _ c _ l n _ ghtm _ r _ " .