The number of reported cases never equals the true number of cases.
Very true; in the USA a good rule of scientific analysis is to multiply the actual number of reported cases by ten.
* The number of COVID-19 related deaths in the USA? I would add approximately 25-30%
** In the US there's no heard immunity strategy, none. The strategy is working relentlessly on vaccine(s). Because self-distancing and mask wearing is not part of American culture. Americans, I believe, are slow to adapt to a new lifestyle.