-
Yeah that's what I meant, as dicki mentioned the long term resistance that might help with future coronaviruses. The next virus is different again, so no.
The fatality rate is probably also due to so many people having it at once, so if it passes through the population slower, as some have visioned, it might not be so high. But I know so little about this that if others have more insight, I'll stop now.
Samuli-
That case fatality rate was calculated at a time when various countries weren't overwhelmed.
Once an individual country's health service is overwhelmed then the case fatality rate is only going to increase due to lack of facilities/ventilators/respirators needed to treat everyone.
If symptoms are mild then the patient will survive regardless.
If a patient has symptoms that are severe then they would have an increased risk of dying if they can't get access to the treatment necessary to keep them alive until their body can combat it.
If a patient has symptoms that are so severe and/or has other health complications then they're probably going to die regardless of the treatment they receive.
Delaying the pandemic, or "smoothing out the bump" is all about ensuring that the right treatment/equipment is available for everyone who needs it. Without this the case fatality rate will climb above the predicted 1% (as it is doing in Italy now).
Greenbank
For Herd Immunity to be effective you need at least 90%-95% of people to have immunity. Exposure to other coronaviruses will do nothing for you against this specific new coronavirus.
Without a vaccine then the only way to have immunity will be to have had this specific virus and survived. Given it has a case fatality rate of ~1% you'll only get to 90% herd immunity levels in the population once a good 700,000 people have died.