Peter Radchenko News Today

As Europe experienced its enormous second wave of the COVID-19 disease, researchers noticed the mortality rate was much lower than during the first wave. This inspired some to study and quantify the mortality rate on a country-by-country basis to determine how much the rate decreased. In Chaos, they introduce methods to study the progression of COVID-19 cases to deaths during the different waves; their methods involve applied mathematics, specifically nonlinear dynamics, and time series analysis...

Mathematical analysis of COVID mortality rates in the US and Europe shows that second-wave mortality was often greatly reduced - particularly in wealthier European countries and the northeast of the US.