COVID-19 is around 50 to 100 times more lethal than the seasonal flu, on average.

How scientists know COVID-19 is way deadlier than the flu
After months of study, scientists have better clarity on the coronavirus's lethal potential—which makes recent case surges all the more alarming.
FRIDAY, 3 JULY 2020

What’s more, scientists today have a better sense of how to measure COVID-19's lethality, and the numbers are alarming. Using a more sophisticated calculation called the infection-fatality rate, paired with the past few months’ worth of data, the latest best estimates show that COVID-19 is around 50 to 100 times more lethal than the seasonal flu, on average.

町山智浩さんがリツイート

“過去数カ月分のデータを使った非常に複雑な最新の計算結果から、新型コロナウイルス感染症の致命割合は季節性インフルエンザより50～100倍も高いことが示されている。” / “新型コロナ、米NYの高い致命率が判明、従来のほぼ倍 | ナショナルジオグラフィック日本版サイト” https://t.co/4oEMIav9gI

— 深町秋生「ヘルドックス 地獄の犬たち」7月下旬文庫化。 (@ash0966) July 9, 2020