Before revision: Reporting lags lead to undercounting in the latest (rightmost) data.|upright=1.3 In epidemiology, the excess deaths or excess mortality is a measure of the increase in the number more deaths during a time period and/or in a population or group, as compared to the expected value or statistical trend during a reference period or in a reference population.
After revision: Reporting lags lead to undercounting in the latest (rightmost) data.|upright=1.3 In epidemiology, the excess deaths or excess mortality is a measure of the increase in the number more deaths during a time period and/or in a certain(typically of five years) group, as compared to the expected value or statistical trend during a reference period or in a reference population.