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23 Dec 2015

WHO to review Merck’s investigational Ebola vaccine for EUAL

Merck (MSD) has announced that the application for Emergency Use Assessment and Listing (EUAL) for the company’s investigational Ebola Zaire vaccine, V920 (rVSV∆G-ZEBOVGP, live attenuated), has been accepted for review by the World Health Organization (WHO).

According to WHO, the EUAL process is designed to expedite the availability of vaccines needed for public health emergencies such as another outbreak of Ebola. The procedure is intended to assist United Nations’ procurement agencies and Member States on the acceptability of using a vaccine candidate in an emergency-use setting. EUAL designation is not prequalification by WHO, but rather is a special procedure implemented when there is an outbreak of a disease with high rates of morbidity and/or mortality and a lack of treatment and/or prevention options. In such instances, WHO may recommend making a vaccine available for a limited time, while further clinical trial data are being gathered for formal regulatory agency review by a national regulatory authority.

“This application to WHO is an important step toward enabling V920 to be used if a public health emergency of international concern were to be declared for the Ebola Zaire species prior to licensure of the vaccine candidate,” said Paula Annunziato, vice president for clinical research, Merck Research Laboratories.

The decision to grant V920 EUAL status will be based on data regarding quality, safety, and efficacy/effectiveness; as well as a risk/benefit analysis for emergency use. While EUAL designation allows for emergency use, the vaccine remains investigational and has not yet been licensed for commercial distribution.

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