COVID-related U.S. deaths as of Sunday night are at 673,763, according to Johns Hopkins University data. – Irfan Khan/Los Angeles Times/TNS

The United States’ known death toll from COVID-19 will surpass the number of dead from the Spanish Flu within the next day or two, according to the side-by-side numbers — though a direct comparison between the raw numbers doesn’t give the whole story, medical experts and statisticians say. What is clear is that the sheer numbers, given the modern-day tools that combat such illnesses, are a heavy burden. COVID-related U.S. deaths as of Sunday night are at 673,763, according to Johns Hopkins University data. That’s just over 1,200 fewer than died in the 1918 Spanish Flu, which took an estimated …