at age 9.the values are below. Are there any chances that my baby can be affected? What is the reason for the high value of IgM in the absence of any clinical infection?
Referance interval: varicella zoster antibody, IgM
0.90 ISR or less.........negative- no significant level of detectable varicella zoster virus IgM antibody.
0.91-1.09 ISR .............equivocal- repeat testing in 10- 14 days may be helpful.
1.10 ISR or greater........positive- significant level of detectable varicella zoster virus IgM antibody.indicative of current or recent infection.however, low levels of Ig M antibodies may ocassionally persist more than 12 months post infection or immunisation.