To the Editor I read with interest the recently published Invited Commentary of Barshak regarding the increasing incidence of invasive Group B Streptococcus (GBS) infection in nonpregnant adults in the United States.1,2 The potential role of vaccination in preventing invasive GBS infection in adults with risk factors such as diabetes or obesity is discussed. The author highlights the uncertainty regarding the potential effectiveness of vaccination in the nonpregnant adult population. One of the reasons proposed by the author is the absence of serotype IV in vaccine candidates. This serotype was shown to emerge as a significant cause of invasive GBS infection in nonpregnant adults in the study by Francois Watkins and colleagues,2 but also in other studies.3
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Dauby N. Vaccination for the Prevention of Group B Streptococcus Infection in Nonpregnant Adults. JAMA Intern Med. 2019;179(7):998–999. doi:10.1001/jamainternmed.2019.1590
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