New PET imaging findings suggest that some of long COVID’s most disabling symptoms may stem from disruption of the brain’s dopamine system. For many people with long COVID, the infection ends but the exhaustion, slowed thinking, memory problems, and loss of motivation do not. Researchers have struggled to explain why these symptoms persist because the [...]

Brain scans suggest long COVID’s biggest clues may lie in the brain’s emotion centers, not widespread inflammation. A new brain imaging study suggests that persistent symptoms of long COVID may not be driven by ongoing brain inflammation, as many researchers have suspected. Scientists in Finland used advanced imaging techniques to examine the brains of people [...]