В Киеве убрали тонны мусорного нашествия: яркая фотоподборка gazeta.ua - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from gazeta.ua Daily Mail and Mail on Sunday newspapers.
Уборка мусора в Киеве - киевляне убрали 30 тонн мусора на субботниках ukranews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ukranews.com Daily Mail and Mail on Sunday newspapers.
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.