Fun facts. From here:
https://www.sccm.org/Communications/Critical-Care-Statistics
Added bold... so ~100k ICU beds to cover
every critical care need. Elsewhere the paper says those beds stay around 65% capacity. So typical available would be 35K beds.
So assuming JUST 0.1% death rate, those 35K beds translate into 35 million sick at once. Just those dying and not including those very sick needing ICU care, but will recover. So 1/10 of the US population can be sick at any one instant... or 9-10 months to reach herd immunity levels.
AHA data: According to the AHA 2015 annual survey, the United States had 4862 acute care registered hospitals; 2814 of these had at least 10 acute care beds and at least 1 ICU bed. These hospitals had a total of 540,668 staffed beds and
94,837 ICU beds (14.3% ICU beds/total beds) in 5229 ICUs. There were 46,490 medical-surgical beds in 2644 units, 14,731 cardiac beds in 976 units, 6588 other beds in 379 units, 4698 pediatric beds in 307 units, and 22,330 neonatal beds in 920 units. The median number of beds in medical-surgical, cardiac, and other units was 12, with 10 beds in pediatrics and 18 in neonatal. Fifty-two percent of hospitals had 1 unit, 24% had 2 units, and 24% had 3 or more units.