Journal
EXPERT REVIEW OF VACCINES
Volume 17, Issue 9, Pages 819-831Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14760584.2018.1510326
Keywords
Enterovirus A; hand, foot, and mouth diseases; inactivated whole-virion vaccine; virus-like particle vaccine; neutralization epitope
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Funding
- Ministry of Science and Technology [MOST 104-2320-B-400-022-MY2]
- National Health Research Institutes [05A1-IVPP11-014, 07A1-IVPP36-014]
- Taipei Medical University-Wan Fang Hospital research program, Taiwan [106-WF-EVA-09]
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Introduction: Hand, foot, and mouth disease (HFMD) is a childhood illness commonly caused by enterovirus A. Enterovirus A71 (EV-A71) and coxsackievirus A16 (CV-A16) are the most commonly identified viruses associated with HFMD. Recently, outbreaks caused by different enterovirus A including CV-A6 and CV-A10 are increasing. Being available now to protect against EV-A71 infection, inactivated EV-A71 vaccines cannot prevent coxsackievirus infections, thus limiting their general application in controlling HFMD. Multivalent HFMD vaccines are suggested to have broad cross-neutralizing responses against these emerging enteroviruses. Areas covered: We discuss the recent development of enterovirus A vaccines including the inactivated whole-virion vaccine and virus-like particle vaccine candidates and review the information of neutralization epitopes of these viruses. Expert commentary: Evaluation of the efficacy and safety of the coxsackievirus vaccine and the multivalent HFMD vaccine candidates in clinical trials is urgently required. Epitopic analysis showed that common immunodominant sites exist across these enteroviruses. However, variations of amino acid residues in these regions limit the induction of cross-neutralization antibodies, and therefore, a multivalent HFMD vaccine is required for broad protection against HFMD. With the inclusion of major circulating viruses in the development of multivalent HFMD vaccines, an increase in the success in HFMD control is anticipated.
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