Cohort 1: These Japanese Red Cedar atopic and non-atopic subjects will be recruited as a placebo control. This cohort will be composed of 5 atopic and 5 non-atopic subjects (half of the subjects will be atopic and half non-atopic), that will receive 4 vaccinations, 14 days apart, of a saline control in four separate 0.200 ml volumes administered Intradermally (ID) using the needle-free Biojector device.