Reports of headaches after receiving the COVID-19 vaccine have been common. While most are nonserious and treatable, researchers in Iran who conducted a new study published in Frontiers in Neurology warn that delayed headache onset “should be considered a red flag.”
According to a survey of nearly 2,000, primarily female respondents, the prevalence of headaches after the first, second, or third vaccine doses was 36.5 percent, 23.3 percent, and 21.7 percent, respectively.
