How does COVID-19 affect the brain?

Bone marrow cells are travelling to the brain in some patients, researchers report

Megakaryocytes are showing up in the brains of people who died of COVID-19, which may help explain some of the neurological problems associated with the disease, researchers say.

In some patients who died of COVID-19, the brain capillaries contained megakaryocytes, large cells which normally reside in the bone marrow and make platelets, said study leader Dr David Nauen of Johns Hopkins University.

"They are so large they could be occluding blood flow through the capillaries and limiting oxygen delivery