Varicella Vaccinations Times Two
March 8, 2018
The Question: Does a second varicella (chickenpox) vaccination provide added protection from chickenpox?
The Study: This study from Germany measured the effectiveness (as measured by immune levels to the virus) of one vaccination versus two vaccinations administered at least four weeks apart, but always before the child’s second birthday.
The Results: Adequate immunity was found in 86.6% of the children after the first vaccination, and 97.3% of the children after the second.
Comment: The most effective vaccination schedule, as determined by maximum immunity levels, is difficult to determine and still a work in progress. The decision shouldn’t be based on “parental intuition” or “concerns over stressing the immune system.” It should be based on good studies looking at the development of effective immunity levels.
Read More: The Journal of Pediatrics, 06/16