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Mathematical disease modelling is also part of epidemiology. You may have seen their work discussed in the press early in the COVID epidemic when they predicted the possible death count and the likely impact of various interventions.

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Well what were their predictions vs actual outcome?

Speaking from experience, last year we had an outbreak in Melbourne, Australia. The local government's response was guided by modelling from epidemiologists (and others), and went on to match the peak and length of the outbreak to the model's estimations almost down to the day[0].

[0]: https://www.abc.net.au/news/2020-10-29/coronavirus-melbourne...

They seem to be doing fairly well now, as well.

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