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In a smallish room, body heat draws particles near, enhancing inhalation

Most models involving inhalation of particulates of various sorts (e.g., microbes, pollen, dust, toxins) assume a somewhat even distribution of the particulates in the air that is inhaled. While such an assumption helps to simplify exposure calculations, it is factually inaccurate in some circumstances...

Are animal models a good analogy for humans? A recently published study of mice suggests that there may be problems

To set standards, animal models are frequently used. Such use allows researchers to investigate disease and injury states in ways which would be considered unethical to inflict on humans. For example, to determine some threshold injury or disease state, various groups of animals may be exposed to widely...