Nov 9, 2016

Times to key events in Zika virus infection and implications for blood donation: a systematic review

Bulletin of the World Health Organization
Justin LesslerLelia H Chaisson

Abstract

To estimate the timing of key events in the natural history of Zika virus infection. In February 2016, we searched PubMed, Scopus and the Web of Science for publications containing the term Zika. By pooling data, we estimated the incubation period, the time to seroconversion and the duration of viral shedding. We estimated the risk of Zika virus contaminated blood donations. We identified 20 articles on 25 patients with Zika virus infection. The median incubation period for the infection was estimated to be 5.9 days (95% credible interval, CrI: 4.4-7.6), with 95% of people who developed symptoms doing so within 11.2 days (95% CrI: 7.6-18.0) after infection. On average, seroconversion occurred 9.1 days (95% CrI: 7.0-11.6) after infection. The virus was detectable in blood for 9.9 days (95% CrI: 6.9-21.4) on average. Without screening, the estimated risk that a blood donation would come from an infected individual increased by approximately 1 in 10 000 for every 1 per 100 000 person-days increase in the incidence of Zika virus infection. Symptom-based screening may reduce this rate by 7% (relative risk, RR: 0.93; 95% CrI: 0.89-0.99) and antibody screening, by 29% (RR: 0.71; 95% CrI: 0.28-0.88). Neither symptom- nor antibody-based...Continue Reading

  • References34
  • Citations36

References

  • References34
  • Citations36

Citations

Mentioned in this Paper

Tumor Virus Infections
Viral Release from Host Cell
Viral Shedding
Virus
Virus Diseases
Blood Donation
Antibody Screen
Polymerase Chain Reaction Analysis
Persons
PubMed

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