Nairobi, Aug. 28 -- The first time I ran into Dr Frank Njenga was in 2015 at Fairview Hotel, Nairobi. He had just finished a meeting at the swimming pool. I asked him for an interview. "Not now, but let's keep talking," he said. Every year for the five years I have run into him or texted him asking for an interview, his response has been the same, "Soon, my friend. When the time is right."

Two weeks ago, I texted. The time was right.

A few months ago, Dr Njenga opened a 103-bed ultra-modern psychiatric hospital in Nairobi to cater to the growing needs of mental health patients. It is a cherry on his psychiatry practice that has spanned for decades since he graduated from the University of Nairobi, trained at the Maudsley Hospital, a psych...