Funny you mention Nigeria, a country scrambling to work out a proper biosafety framework and educate farmers [1] so that they can feed a population that is #40 on the hunger index [2], with nearly a tenth undernourished [3]. With the current life expectancy of ~50 years [4], there's a ways to go for Nigerians to see any negative health effects from GMOs among the noise of malnutrition and stunted growth, if there is any to be found (and we've been trying for a while now).