CNN —Mary Achieng’s family is in the malaria ward at Nightingale Hospital in western Kenya almost every month. Mary Achieng and her child on the malaria wars at the Nightingale Hospital in western Kenya. Now with the introduction of the world’s first malaria vaccine, hailed as a breakthrough, there is talk of one day reaching eradication. So it’s a bitter irony that as Kenya celebrates hard-earned gains, new malaria species and cases are popping up in areas historically deemed low-risk. We are seeing [malaria] going to places where we didn’t expect,” she said.

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