Nigeria's two major contenders, Buhari, 76, and Atiku, 72, both have long histories of political engagement in Nigeria, leaving many to question their health and longevity as presidential hopefuls.
Wagombea wakuu wa urais wa urais wa Nigeria Buhari, 76 na Atiku, 72, wote wana historia ndefu katika kujihusisha na siasa za Nigeria wakiacha maswali mengi kuhusu afya zao na urefu wa muda wao kama watarajiwa wa Urais.