"No one knows how much exposure causes disease".
Prolonged exposure causes the equivalent of sunburn to the lungs.
It is a hypothesis to support the hypothesis that sun exposure causes melanoma, he says.
One possibility is that early exposure causes the immune system to produce protective antibodies, but without allergic sensitization.
If such persons can escape exposure to the allergen for several weeks, subsequent exposure causes much less severe attacks.
Some scientists, medical experts, and Gulf War veterans believe that exposure causes a variety of health problems, including cancer.
Skin exposure causes painful blisters, burns and skin whitening.
Lead exposure causes weakness in fingers, wrists and ankles.
Fire exposure causes significant mechanical property degradation of metallic materials.
Chronic lead exposure causes depression, headaches, aggression and memory loss.
When the tissue was then examined under a microscope, no damage was found, and even prolonged exposure causes no heating.
