Early transmission of SARS-CoV-2 in South Africa: an epidemiological and phylogenetic report by Giandhari, J, Pillay, S, Wilkinson, E, Tegally, H, Sinayskiy, I, Schuld, M, Lourenço, J, Chimukangara, B, Lessells, R, Moosa, Y, Gazy, I, Fish, M, Singh, L, Sedwell Khanyile, K, Fonseca, V, Giovanetti, M, Carlos Junior Alcantara, L, Petruccione, F, de Oliveira, T