"But there's another way to look at the deaths related to each pandemic: comparing deaths during a pandemic to the baseline that you'd expect during a particular time. There were more "excess deaths" during the 1918 flu than the early COVID-19 outbreak. But in relative terms, the COVID-19 outbreak in the spring actually looks worse, because the numbers quadrupled from pre-pandemic times (from a baseline of around 50 deaths per 100,000 people per month), whereas in the peak of the 1918 flu, the numbers less than tripled (from a baseline of around 100 deaths per 100,000 people per month). "Its a bigger shock to our system, but that's a little bit unfair because we started off at a lower death rate," than there was in 1918, due to advances in hygiene, medicine, public health and safety, Faust said. Really, we don't yet know if the 1918 pandemic or the COVID-19 pandemic is more deadly, he added. Maybe what happened in New York in the spring was a "freak thing," before interventions such as masks and shutdowns took hold; or maybe the numbers will slowly creep up to match the death tolls seen in the 1918 flu until an effective vaccine is found. One limitation of the study is that it's not possible to directly compare how infectious and harmful the two viruses are to people and it's unknown how many deaths from SARS-CoV-2 were prevented because of modern interventions that weren't available a century ago, the authors wrote."