Nairobi, May 24 -- When John Mukinisu started waking up soaked in sweat every night back in 2021, at first he blamed it on the heat, then on the effects of Covid-19 and the vaccines he had received earlier.

Every day, between 3am and 4 am he would wake up to find his sheets completely soaked, change, and then go back to sleep.

Then came another trend: an unending tiredness and a burning sensation in his hands.

"I was experiencing these symptoms, and, because I had received the Covid-19 vaccine, I thought they were side effects," he says.

However, it was neither a symptom of the virus nor the vaccine. One day, he experienced painful swelling in his left arm and pain when passing urine. These symptoms eventually prompted him to see a do...