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. 2023 Jul 26;10(7):221656. doi: 10.1098/rsos.221656

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© 2023 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 7. — Simulation results of model (2.2) showing the effect of NPIs (ϕ) on the infected population for the four waves of the South Africa COVID-19 epidemic: (a) first wave, (b) second wave, (c) third wave and (d) fourth wave.