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Updated: Aug 14, 2026

Development of an IFN-γ ELISpot Assay to Assess Varicella-Zoster Virus-specific Cell-mediated Immunity Following Umbilical Cord Blood Transplantation
Published on: July 9, 2014
In September 2005, we published an article on Chickenpox, pregnancy and the newborn. One of the issues it considered was fetal varicella syndrome, an uncommon but potentially fatal consequence of in-utero chickenpox infection. We reported evidence suggesting that contracting maternal chickenpox within the first 28 weeks of pregnancy can lead to fetal varicella syndrome. This suggestion was questioned after publication since it was at odds with national guidance in the U.K. and elsewhere, which has indicated that fetal varicella syndrome occurs only where maternal chickenpox develops before 20 weeks of pregnancy. Here we discuss in more detail the basis for our conclusion and its implications.
In September 2005, we published an article on Chickenpox, pregnancy and the newborn. One of the issues it considered was fetal varicella syndrome, an uncommon but potentially fatal consequence of in-utero chickenpox infection. We reported evidence suggesting that contracting maternal chickenpox within the first 28 weeks of pregnancy can lead to fetal varicella syndrome. This suggestion was questioned after publication since it was at odds with national guidance in the U.K. and elsewhere, which has indicated that fetal varicella syndrome occurs only where maternal chickenpox develops before 20 weeks of pregnancy. Here we discuss in more detail the basis for our conclusion and its implications.
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