Scott, L, Hsiao, NY, Moyo, S, Singh, L, Tegally, H, Dor, G, Maes, P, Pybus, OG, Kraemer, MUG, Semenova, E, Bhatt, S, Flaxman, S, Faria, NR, de Oliveira, T, "Track Omicron's spread with molecular data", , 2021