[AfricaFocus] "Covid-19 is a crisis on a crisis - it is a health crisis on top of existing social, economic and political crises in SA. Every faultline is exposed: those with food security, and those who go hungry; those with jobs and the unemployed; those with water and sanitation and those without; those who drive cars and those in crowded public transport; those in well-resourced schools with small classes and those in overcrowded, under-resourced schools; those who use private health care and those who wait in long