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This list of risk factors is a long one, but a new British study called the International Severe Acute Respiratory and Emerging Infection Consortium (ISARIC) that surveyed seventeen thousand hospitalized coronavirus patients gives us the best understanding of who is actually at high risk.

The study, which analyzed patient data from February 2020 through April 2020, showed that the virus is virulent and quite often deadly. The study also found that certain preexisting conditions raise the risk of both complications and death.

Mortality rates for those hospitalized were high, with 33 percent of those admitted to a hospital for the virus dying. The mortality rates rose as patients developed complications, with 45 percent placed in intensive care units (ICUs) dying. Similarly, the study found that 53 percent of ICU patients placed on ventilators also died.

The study found the risk factors that raised the likelihood of dying were dementia (39 percent), obesity (37 percent), and heart disease (31 percent).