Dr. Arun Garg (The Medicity, Gurugram, India) said, "[I notice] a spike in stroke cases among young patients not suffering from known risk factors such as diabetes, hypertension and obesity.. Similarly, we are seeing more cases of encephalopathy, swelling of the brain, without reason and having a confused state of mind following one or two days of fever. Their MRI scans show no changes. These patients have increased significantly after Covid.. [Currently,] Other than routine blood tests that measure inflammation, we do antibody tests to look for direct markers. In many of these patients, we are finding rare antibodies which are very new to us and were not there pre-Covid."