Although the WHO says the true death rate for COVID-19 will take some time to fully understand, the current data it has so far, suggests the crude mortality ratio (the number of reported deaths divided by the reported cases) is between 3-4%. ... For seasonal flu, it is usually well below 0.1%, but a big factor is the quality of health care available for some patients (in different parts of the world). https://news.sky.com/story/coronavirus-vs-the-flu-how-they-differ-and-why-your-winter-jab-wont-help-11955375
... and so on and so forth and suchlike. And it's not just about death rates, in Italy 10% of cases end up in intesive care. It stretches health systems to breaking point.