Sensitivity to poison ivy varies from person to person and also varies throughout the lifetime of a single individual. There are some who are not at all allergic to poison ivy (about 10% of the population). For those who are allergic, the amount needed to cause a reaction varies. There are some who need only 1 nanogram (billionth of a gram) to cause a reaction, although the average is 100 nanograms.
Click here to cancel reply.
Sorry,At this time user registration is disabled. We will open registration soon!
Don't have an account? Click Here to Signup
© Copyright GreenAnswers.com LLC