Interactive chart of the number of COVID-19 tests performed in Hong Kong compared to other countries

For a vaierty of reasons, ranging from differences in exposure to reporting biase, reported COVID-19 cases would not distriute equally among different age groups and genders. The age-gender specific incidence rate (per million) is calcualted by dividing the number of cases in each age-gender group by the population (million) of that age-gender group. This normalizes the difference in the population size of each age-gender group. This indicator is useful for showing which age-gender group is at greater risk.