(HealthDay)—The use of 15 headache days/month as a threshold to distinguish episodic and chronic migraine does not capture the burden of illness, according to a study recently published online in Headache. Ryotaro...

An international team of researchers has found that just 4.4 percent of people in France have been infected with the SARS-CoV-2 virus—a percentage far below that needed for herd immunity. In their paper...