CAROLINE WAMBUI IN the last three months, teacher Faith Njeri has been a regular customer at a courier service office in Nairobi, collecting parcels sent from her village three hours drive north of the capital. When the coronavirus pandemic closed the private school where she taught, "I was left jobless," she said. Efforts to feed her family by washing clothes failed "as people avoided any intrusions in their homes for fear of getting infected with the virus." With three hungry children and no alternatives, she called her parents in her home village, asking them to send food to keep the…