Headline: COVID vaccine study raises questions about boostersLink: https://sanduskyregister.com/news/436005/COVID-vaccine-study-raises-questions-ab…Publication Date: Monday, January 2, 2023Primary Source: Sandusky Register (OH)Other Sources: The Advertiser-Tribune (OH)Type: articleFormat: Newspaper (Print)Nature of Mention: citedScholar: Singer, Jeffrey A.Research Area: Health, Welfare & EntitlementsSubjects: a new study finding that employees with a high number of vaccine doses were more likely to contract COVID-19