As patients with COVID-19 continue pouring into emergency departments and intensive care units across the nation, an old treatment that has been adapted for a new disease is being tested in New York.

WASHINGTON — The Food and Drug Administration announced Sunday that it has authorized the use of blood plasma from patients who have recovered from Covid-19 as a treatment for the disease. The ...

The Trump administration's announcement Sunday of an emergency use authorization for convalescent plasma left critical questions about the potential COVID-19 treatment unanswered. Which patients will ...

Plasma, the fourth state of matter, is created by applying electrical energy to a gas, causing ion formation. When an energy source, such as electrical energy or radio waves, transfers energy to gas ...