Dr. Megan Ranney has learned a lot about COVID-19 since she began treating patients with the disease in the emergency department in February.
But there’s one question she still can’t answer: What makes some patients so much sicker than others?
Advancing age and underlying medical problems explain only part of the phenomenon, said Ranney, who has seen patients of similar age, background and health status follow wildly different trajectories.
“Why does one 40-year-old get really sick and another one not even need to be admitted?” asked Ranney, an associate professor of emergency medicine at Brown University.
In some cases, provocative new research shows, some people — men in particular — succumb because their immune systems are hit by friendly fire. Researchers hope the finding will help them develop targeted therapies for these patients.
In an international study in Science, 10% of nearly 1,000 COVID patients who developed life-threatening pneumonia had