(Luis Álvarez/DigitalVision via Getty Images) Lea en español On March 11, 2020, when the World Health Organization declared COVID-19 a pandemic, everyone wanted to know: “What is this disease, and how can we stop it?” After three years of terrible loss – including more than 1.1 million U.S. deaths, according to the Centers for Disease…

(wildpixel/iStock via Getty Images) Lea en español This much researchers agree upon: Long COVID is a serious and sometimes debilitating condition that can strike previously healthy people after even mild bouts of COVID-19. And rapid progress is being made in understanding it. But three years into the pandemic, much about long COVID – what causes…

(Irina Shatilova/iStock via Getty Images) People hospitalized with COVID-19 may have an increased risk for heart damage, but not so much the type of inflammation previous research suggested, according to a new study. Early in the pandemic, several studies suggested many COVID-19 survivors experienced heart damage even if they didn’t have underlying heart disease and…

(Jorg Greuel/Photodisc via Getty Images) After steadily declining for nearly a decade, the heart disease death rate rose significantly during the first year of the COVID-19 pandemic, new research finds. The increase erased years of progress, especially among Black and younger adults. “Prior to 2020, death rates from heart disease had been declining among adults…

(Coolpicture/Moment via Getty Images) Donor hearts from people with COVID-19 may be just as safe as those from people without, finds a short-term analysis of the first such transplants done in the United States. “These findings suggest that we may be able to be more aggressive about accepting donors that are positive for COVID-19 when…

(Flavio Coelho/Moment via Getty Images) Seeking to clarify connections between pre-existing heart disease and COVID-19, a study of critically ill patients has found their risk of dying from COVID-19 may stem not directly from heart disease, but from the factors that contribute to it. People with heart disease have been, and continue to be, at…

(SCIEPRO/Science Photo Library via Getty Images) People who got COVID-19 had a higher risk of dangerous blood clots for close to a year later, according to a large new study on the aftereffects of a SARS-CoV-2 infection during the period before vaccines became available. As seen in previous studies, COVID-19 was linked to a sharply…