Revista Panamericana de Salud Publica/Pan American Journal of Public Health 2018
Yellow fever vaccine and risk of developing serious adverse events: a systematic review.
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Results
The results for first dose of YFV in elderly patients were conflicting-some showed AEs while some showed benefits. Therefore, precaution and case-by-case decisionmaking for YFV in this population are advised. The same precautions are warranted for YFV in infants 6-8 months, with the vaccine contraindicated in those < 6 months old and safe after 9 months of age. YFV seems safe in the first trimester of pregnancy, and probably throughout gestation, as it was not associated with increased malformations. During breastfeeding, YFV continues to be controversial. The vaccine seems safe in people being treated with immunomodulatory or immunosuppressive therapy, people with immunosuppressive diseases, and solid organ and hematopoietic stem cell transplant patients; in stem cell transplants, however, a booster dose should only be applied once immunity is recovered. HlV-infected patients with a CD4+ count > 200 cells/mm3 do not have increased risk of AEs from YFV. Egg allergy vaccination protocols seem to provide a safe way to immunize these patients.