Cited by 9Viral Infections and Immunology ResearchVirology and Viral DiseasesPoxvirus research and outbreaks

The Long and Winding Road to Eradicate Vaccine-Related Polioviruses

Open access
Cochi, Stephen L, Pallansch, Mark A·2021·The Journal of Infectious Diseases

Abstract

As the vaccine of choice for the Global Polio Eradication Initiative (GPEI), oral poliovirus vaccine (OPV) is inexpensive, easy to administer, and can provide good protection against poliomyelitis and poliovirus infection, through durable humoral immunity and induction of intestinal mucosal immunity.Even though trivalent OPV is a safe and effective vaccine and has a remarkable disease elimination record, all 3 strains are live attenuated RNA viruses capable of genetic mutation during replication.This means that polioviruses in OPV can undergo genetic changes in vaccine recipients to reverse attenuation.This inherent in-stability represents a key disadvantage of OPV that is manifest in some of the current polio eradication challenges.It has long been known that sporadic cases of vaccine-associated paralytic polio (VAPP) occur in recently vaccinated individuals (recipient VAPP) and in susceptible persons indirectly exposed to vaccine virus, such as close contacts of persons recently vaccinated or community contacts (contact VAPP).The global burden of VAPP was estimated in 2011 to be approximately 250-500 cases per year [1].In countries using OPV, of the 3 poliovirus vaccine serotypes, type 3 is the predominant serotype isolated from the stool of recipient and contact VAPP cases, followed by type 2 and then type 1 [1,2].The higher frequency of type 2 and type 3 VAPP may be related to the fewer nucleotide substitutions responsible for the attenuated phenotype in types 2 and 3 virus strains, making reversion easier [2].As global eradication progressed in the decade following the World Health Assembly declaration of the global eradication goal in 1988, many countries achieved the elimination of all 3 types of indigenous wild polioviruses, including many in the developing world.However, these newly polio-free countries were now completely dependent on vaccination to maintain immunity against polio in the population.The continued use of OPV with low coverage led to a widening immunity gap and revealed another manifestation of the genetic in-stability of the polioviruses in OPV.In this case, instead of OPV-related polio being restricted to vaccine recipients and contacts, the vaccine virus continues to transmit from

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1093/infdis/jiaa393

Cites

11 of 11 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • OPV strains can mutate and evolve into VDPV, which may be neurovirulent in vaccinated individuals due to intrinsic genetic instability.

    “However, OPV strains can mutate and evolve into VDPV, which may be neurovirulent in vaccinated individuals due to their intrinsic genetic instability [78,79,80,81].”

    From The Fight against Poliovirus Is Not Over (2023) · cites this paper as [81]

    In the main text (page unavailable), the paper says OPV strains can mutate because of inherent genetic instability and that continued mutation can produce neurovirulent VDPVs. It separately describes vaccine-associated paralytic polio in recently vaccinated individuals; it does not specifically say that VDPVs are neurovirulent in vaccinated individuals. (LLM, conf=0.87)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. [2]Sutter RW, Kew OM, Cochi SL, Aylward BA. Poliovirus vaccine-live. In: Plotkin SA, Orenstein WA, eds. Vaccines. 7th ed. Philadelphia, PA: Elsevier, 2018: 866– 916.

Cited by

Sorted by citations

Authors
Cochi, S. L., & Pallansch, M. A.
Affiliations
Centers for Disease Control and Prevention (US)
Corresponding author
Cochi, Stephen L
Venue
The Journal of Infectious Diseases
Published
2020-07-05
Volume
223
Issue
1
Pages
7-9
ISSN
  • 0022-1899 (ISSN-L)
  • 1537-6613
OpenAlex
W3039863063
Cited by
9
References
11
Citations by year
2025: 2 · 2023: 4 · 2022: 2 · 2021: 1
Type
journal article
Language
en
Open access
Licence
public-domain
Locations
  • The Journal of Infectious Diseases (publishedVersion, public-domain)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
Centers for Disease Control and Prevention
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Viral Infections and Immunology Research
  • Health Sciences › Medicine › Epidemiology › Virology and Viral Diseases
  • Life Sciences › Immunology and Microbiology › Virology › Poxvirus research and outbreaks
Keywords
oral polio vaccine, vaccine-associated paralytic poliomyelitis, vaccine-derived poliovirus, trivalent oral polio vaccine, Global Polio Eradication Initiative, polio eradication, immunity gaps
MeSH terms
Child, Humans, Lithuania, Poliomyelitis, Poliovirus Vaccine, Inactivated, Poliovirus Vaccine, Oral, Poliovirus

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review