In New York City, Boston and Chicago — cities with some of the country’s earliest Omicron surges — deaths have followed cases at a slightly reduced scale than in previous peaks. But because of the extraordinarily high case count, even a proportionally lower death toll from the current case curve in the United States could be devastating.

In early-hit cities, hospitals are seeing more patients testing positive for Covid-19 than at any time last year. Because of the sheer infectiousness of the Omicron variant, many who arrive at the hospital for other ailments test positive for the coronavirus. Some doctors have also said that patients who do have Covid as a primary diagnosis are faring better than during previous waves.

Even so, the number of Covid-19 patients who need intensive care or mechanical ventilation is approaching levels not seen since last winter. And the sheer number of patients is overwhelming to hospitals, where staffing shortages are putting healthcare workers under immense strain.