https://www.nih.gov/news-events/news-releases/rapid-response-was-crucial-containing-1918-flu-pandemic
what was done by the federal government in 1918-1919 that we didn’t do this time?
from the article posted by the NIH.
“If St. Louis had waited another week or two, they might have fared the same as Philadelphia, says the lead author on the first study, Richard Hatchett, M.D., an associate director for emergency preparedness at NIAID. Despite the fact that these cities had dramatically different outcomes early on, all the cities in the survey ultimately experienced significant epidemics because, in the absence of an effective vaccine, the virus continued to spread or recurred as cities relaxed their restrictions.”
cities that had things under control, relaxed restrictions, and spread then continued. Unless you want to be locked down until an effective vaccine is commercially available, this is what happens with a highly contagious virus.