There's some good info in here from the head of the CDC, from an NPR interview:
"Yet the nation's public health agency, [the CDC,] with its distinguished history of successfully fighting scourges such as polio and smallpox, has been conspicuously absent in recent weeks as infections and deaths from the new coronavirus soared in the U.S.
On Monday, Redfield agreed to a phone interview with Sam Whitehead, the health reporter at WABE in Atlanta, where he also hosts a coronavirus podcast.
Has the CDC learned anything new about the virus, such as how contagious it is or how it is transmitted, in recent weeks?
Let's take transmission. ... This virus does have the ability to transmit far easier than flu. It's probably now about three times as infectious as flu.
One of the [pieces of] information that we have pretty much confirmed now is that a significant number of individuals that are infected actually remain asymptomatic. That may be as many as 25%. That's important, because now you have individuals that may not have any symptoms that can contribute to transmission, and we have learned that in fact they do contribute to transmission.
And finally, of those of us that get symptomatic, it appears that we're shedding significant virus in our oropharyngeal compartment, probably up to 48 hours before we show symptoms. This helps explain how rapidly this virus continues to spread across the country, because we have asymptomatic transmitters and we have individuals who are transmitting 48 hours before they become symptomatic.
We know there is asymptomatic spread. ... Is the mask something that protects me or ... if I wear a mask, is it something that protects others, from me?
Particularly with the new data, that there's significant asymptomatic transmission, this is being critically re-reviewed to see if there's potential additional value for individuals that are infected or individuals that may be asymptomatically infected. ...
Coronavirus models the Trump administration has been looking at suggest an initial surge in hospitalizations and deaths in April or May. But [after those surges] 95% of Americans will still have not been exposed to this virus at all. To protect those 95% of Americans, won't we need massive testing all over the country to control any renewed spread?
Most respiratory viruses have a seasonality to them, and it's reasonable to hypothesize — we'll have to wait and see — but I think many of us believe as we're moving into the late spring, early summer season, you're going to see the transmission decrease, similar to what we see with flu as the virus then moves into the Southern Hemisphere.
This virus cannot go from person to person that easily. It needs us to be close. It needs us to be within 6 feet. If we just distance ourselves, this virus can't sustain itself and it will go out.
When will the CDC have some kind of public tracking system of every single test result in the country, whether that's done in a hospital or by a public or commercial lab? Knowing where these cases are prepares you to respond.
I think we're really close. I mean, we get daily reports from all of the testings coming in. Obviously, FEMA is the data coordinating center, but I think really strong, integrated data is currently occurring down at the county level, where we're getting positive tests, and where we're seeing new clusters, and where we are responding.
One of the critical areas is, of course, long-term-care facilities. We now have over 400 long-term-care facilities in this nation that have now outbreaks. We're constantly going into those care facilities trying to limit these outbreaks or obviously trying to prepare other assisted living centers.
At the end of the day, most of us who get this infection will recover. The majority of people do — probably 98%, almost 98.5%, 99% recover. The challenge is the older, the vulnerable, the elderly, those with significant medical conditions where this virus has shown a propensity to have a significant mortality."
https://www.npr.org/sections/health-shots/2020/03/31/824155179/cdc-director-on-models-for-the-months-to-come-this-virus-is-going-to-be-with-us