The news is awash with discussions about the effectiveness and reported side effects of specific vaccines, and ongoing patterns of infections, hospitalisations and fatalities. We routinely use numbers from catching a train to buying a house, and read news reports on elections and polls, currency conversion rates and shares, sports scores and weather forecasts. Numbers are needed for all research, because all researchers have to read and judge the trustworthiness of the research of others, including research that involves numbers.

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