Change in anti-KLH IgG antibody response to two vaccinations of KLH in nonatopic participants At baseline and Day 47 [clinicaltrials_resource:fb572471973c251b267e83251fa5c04f]

Participants will receive a total of two 100 mcg intradermal (ID) KLH immunizations with 1 mg/ml KLH per immunization. Immunizations will be given 21 days apart at Visits 5 and 6.

Change in anti-KLH IgG antibody response to two vaccinations of KLH in nonatopic participants At baseline and Day 47 [clinicaltrials_resource:fb572471973c251b267e83251fa5c04f]

Participants will receive a total of two 100 mcg intradermal (ID) KLH immunizations with 1 mg/ml KLH per immunization. Immunizations will be given 21 days apart at Visits 5 and 6.