En Estados Unidos, hoy día, los niños reciben 11 vacunaciones de rutina, lo que implica 20 pinchazos antes de los 2 años. Pero su sistema inmunitario es fuerte y no sólo soporta bien todas estas inmunizaciones, sino que, en opinión de los autores, está capacitado teóricamente para soportar 10.000 vacunaciones al mismo tiempo. Calculan que administrar 11 vacunas simultáneas a un niño tan sólo "consumirían" un 0,1% de su sistema inmunitario.
Además, añaden que las vacunas que se emplean hoy día contienen menos antígenos que las más antiguas. Por ejemplo, la vacuna de la viruela que se administraba hace un siglo contenía 200 proteínas, mientras que las 11 vacunas que se usan en la actualidad contienen en total 130.
Por todo ello, concluyen que los actuales estudios no apoyan la hipótesis de que la administración de muchas vacunas "arrolle", debilite o "consuma" el sistema inmune.
Webs Relacionadas
Pediatrics
http://www.pediatrics.org/
Children's Hospital of Philadelphia
http://www.chop.edu/consumer/index.jsp
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