Brain virus
The current pandemic has made us more aware of the potential for viruses to cause lingering health problems. So-called long Covid has a growing list, including headaches, brain fog, joint pain and shortness of breath, that can persist for months.
Unfortunately, any virus brings a small chance of longer-term problems. For instance, the normally harmless reovirus has been linked to developing the gluten allergy coeliac disease. Chronic fatigue syndrome may be
