In one of the first large, real-world studies comparing the effectiveness of COVID-19 vaccines versus natural immunity in protecting against death, hospitalizations and emergency department (ED) visits for any cause, including COVID, researchers report that people of all age groups benefited significantly more from vaccination than natural immunity acquired from a previous COVID infection. The lower death rate of vaccinated individuals was especially impressive for adults ages 60 years or older.

In one of the first large, real-world studies comparing the effectiveness of COVID-19 vaccines versus natural immunity in protecting against death, hospitalizations and emergency department (ED) visits for any cause, including COVID, researchers report that people of all age groups benefited significantly more from vaccination than natural immunity acquired from a previous COVID infection. The lower death rate of vaccinated individuals was especially impressive for adults ages 60 years or older.

Scientists have developed a quantum experiment that allows them to study the dynamics, or behavior, of a special kind of theoretical wormhole.

Astronomers have determined the source of an incredibly bright X-ray, optical and radio signal appearing from halfway across the Universe.

Astronomers have determined the source of an incredibly bright X-ray, optical and radio signal appearing from halfway across the Universe.

New research indicates that domestic horses originated in the steppes of modern-day Ukraine, southwest Russia and west Kazakhstan, mixing with local wild stocks as they spread throughout Europe and Asia.