Sɛ obi bɔ ne ho ban fi atiridii ho a, saa yɛ sen sɛ obi bɛko atia atiridii no wɔ bere a woanya bi. Nea ehia kɛse no bi ne sɛ wɔbɛtrɛw mu adu akyiri wɔ mmeae a ohia abu so wɔ hɔ. There is a wide difference in the costs of control (i.e. maintenance of low endemicity) and elimination programs between countries.