Another reason to flatten the curve is the chance for mutation. Viruses mutate, that is sort of their job without mutation they die out. When they mutate sometimes they get more deadly and sometimes they get less deadly. The number of hosts dying makes zero difference to the virus, it just needs to infect. (if every host dies then nothing is left to infect, but viruses don't think so that isn't part of the biological imperative) If viruses don't mutate then immunity of hosts catches up sooner rather than later. It is most likely that this virus would mutate to be less deadly. Not because it cares, but because it is already pretty deadly or we wouldn't be in this crazy pandemic situation. It is a deadly mutated strain of coronaviridae already. The mutation rate is still being calculated, but early data suggests are that it is not a fast mutating pathogen meaning a long term vaccine is likely. Also, meaning natural immunity will help slow the seasonal transmission. It is likely Covid19 will be back in the fall. Hopefully, natural immunity and a vaccine have time to do their thing by then. If not, maybe it will mutate. It is being very successful right now so it has less biological incentive to mutate. Not because it is thinking, but because of natural selection.
Here are a couple boring articles about mutation in very similar coronaviruses. The one about SARS(heavy reading, but not terrible) which affected people the other is about a feline version (terrible reading) that is much more deadly. Luckily the feline version hasn't made its way to humans yet. The feline article uses the word cleavage quite a bit, but don't get too excited it isn't that kind of cleavage. It might be science nerd clickbait
Background The outbreak of severe acute respiratory syndrome (SARS) caused a severe global epidemic in 2003 which led to hundreds of deaths and many thousands of hospitalizations. The virus causing SARS was identified as a novel coronavirus (SARS-CoV) and multiple genomic sequences have been...
bmcevolbiol.biomedcentral.com
*** The conclusion from the article if you don't want to read the whole thing
The estimated mutation rate and the synonymous and non-synonymous substitution rates in the SARS-CoV genome were moderate compared to that in coronavirus and other RNA viruses, suggesting that the SARS-CoV is not an unusual coronavirus in terms of its speed of nucleotide or amino acid changes. Based on the mutation rates estimated in this study, the emerging time of the most recent common ancestor of the 16 isolates can be placed between February 2002 and November 2002. This suggests that the SARS-CoV could have been with humans as early as the spring of 2002 without causing a severe epidemic.
Feline coronaviruses (FCoV) exist as 2 biotypes: feline enteric coronavirus (FECV) and feline infectious peritonitis virus (FIPV). FECV causes subclinical infections; FIPV causes feline infectious peritonitis (FIP), a systemic and fatal disease. It is ...
www.ncbi.nlm.nih.gov
I understand the idea that a quickly made vaccine is scary(I am leery too), but much of the science is already done. Hopefully, vaccines that have been used for similar coronaviridae can be adapter to fit the situation we are in. It still takes time to get it right, but it isn't like we are starting from scratch. It is too bad funding dried up for the vaccines we were already working on for coronavirus strains.
The reason china is back to normal sooner the the US projection is easy. People got locked away and the military got involved. Murica isn't ready for that level of guberment reach, nor should we be. I am not saying we should all turn in our freedom cards and let the government direct our lives, but in the counties that are more government run a pandemic is easier to contain, assuming the government steps in. We aren't used to being told what to do. Many of us don't want to listen even if the science and data backs it up.
If a military enemy came to America to try to kill us (even if it was
mostly sick or elderly people) we would fight with everything we have. We wouldn't hand weapons to the elderly and say stay in your house and fend for yourself, I don't want my routine messed up. This enemy is unseen and since it attacks with an inconvenience we have a hard time banding together to fight it. Our best weapon against this enemy is distance, hygiene, science, and time.