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"Some other people say that the drugs will be in private pharmacies... as a boda-boda rider I don't know whether I can raise the money to sustain my treatment."

He does not think his job driving a motorbike taxi - known locally as a "boda-boda" - will be able to help his family get over the hurdles they now face.

Nairobi drivers earn on average about $10-15 a day, according to the country's Boda-Boda Association.

So far only about 2,000 boda-boda drivers have switched from petrol to electric.

But if you go beyond the city, it is a different story - and that is a huge disincentive for most boda-boda drivers I spoke to when I was in Nairobi.