" The World Health Organization (WHO) reports a decline in coronavirus fatalities across the globe, Hans Henri Kluge, WHO regional director for Europe, said in an interview with TASS.
"There is [an] increasing [number] of cases, but lower mortality and less people in hospitals, and less people in intensive care units," he said."
William Farr demonstrated that epidemics decline at a mathematically predictable rate, using empirical observations of a smallpox epidemic to confirm this. He later formulated several other mathematical equations and laws that apply to epidemics, e.g., that prevalence of a disease can be calculated from the mathematical product of incidence and the average duration.
In the mid-19th century, Dr. William Farr made the observation that epidemic events rise and fall in a roughly symmetrical pattern that can be approximated by a bell-shaped curve. He noticed that this time-evolution behavior could be captured by a single mathematical formula (“Farr's law”) that could be used for epidemic forecasting.