> These people are often vulnerable. Recent data from South Carolina show 79% of people hospitalized with breakthrough infections there had at least one existing health condition, such as diabetes. In the intensive-care unit, where hospitals treat the most severely ill patients, the percentage increased to 88%.
According to a CDC study, 94.9% of hospitalized COVID-19 patients (March 2020 - March 2021) had at least 1 underlying medical condition [1]. I'd argue that COVID-19 hospitalizations (vaccinated/unvaccinated) are always concentrated among the most vulnerable.