The National Institutes of Health's Dr. Anthony Fauci provided an explanation for why we might not know whether we’re actually flattening the curve for several weeks of containment and mitigation measures.
Fauci said that because the curve of those who have the virus will certainly continue to go up, it will be hard to tell immediately whether those measure are having an effect.
“It probably would be several weeks or maybe longer before we know whether we had an effect. And maybe, at the end of the day, we’ll see a curve that would’ve been way, way up. But I wouldn’t, like, put us to task every few days. ‘Well wait a minute, it’s going up, is it working or not?’ That would be really misleading if we do that,” he said.