Theoretical risk of genetic reassortment should not impede development of live, attenuated Rift Valley fever (RVF) vaccines commentary on the draft WHO RVF Target Product Profile

Thomas P. Monath, Jeroen Kortekaas, Douglas M. Watts, Rebecca C. Christofferson, Angelle Desiree LaBeaud, Brian Gowen, Clarence J. Peters, Darci R. Smith, Robert Swanepoel, John C. Morrill, Thomas G. Ksiazek, Phillip R. Pittman, Brian H. Bird, George Bettinger

Research output: Contribution to journalReview article

Abstract

In November 2019, The World Health Organization (WHO) issued a draft set of Target Product Profiles (TPPs) describing optimal and minimally acceptable targets for vaccines against Rift Valley fever (RVF), a Phlebovirus with a three segmented genome, in both humans and ruminants. The TPPs contained rigid requirements to protect against genomic reassortment of live, attenuated vaccines (LAVs) with wild-type RVF virus (RVFV), which place undue constraints on development and regulatory approval of LAVs. We review the current LAVs in use and in development, and conclude that there is no evidence that reassortment between LAVs and wild-type RVFV has occurred during field use, that such a reassortment event if it occurred would have no untoward consequence, and that the TPPs should be revised to provide a more balanced assessment of the benefits versus the theoretical risks of reassortment.

Original languageEnglish (US)
Article number100060
JournalVaccine: X
Volume5
DOIs
StatePublished - Aug 7 2020

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Keywords

  • Genetic reassortment
  • Rift Valley Fever vaccine
  • Target Product Profile

ASJC Scopus subject areas

  • Molecular Medicine
  • Immunology and Microbiology(all)
  • veterinary(all)
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases

Cite this

Monath, T. P., Kortekaas, J., Watts, D. M., Christofferson, R. C., Desiree LaBeaud, A., Gowen, B., Peters, C. J., Smith, D. R., Swanepoel, R., Morrill, J. C., Ksiazek, T. G., Pittman, P. R., Bird, B. H., & Bettinger, G. (2020). Theoretical risk of genetic reassortment should not impede development of live, attenuated Rift Valley fever (RVF) vaccines commentary on the draft WHO RVF Target Product Profile. Vaccine: X, 5, [100060]. https://doi.org/10.1016/j.jvacx.2020.100060