Answer: Hypersensitivity reaction is a condition in which the normally protective immune system has a harmful effect on the body. It involves harmful immune response following sensitization and subsequent antigen contact. Type IV such as contact dermatitis reactions are delayed and cell-mediated and are the only hypersensitivity reaction that involves sensitized T lymphocytes rather than antibodies.
Answer:
<h3>Parasites infecting human beings are called human parasites. Parasitic diseases can affect practically all living organisms, including plants and mammals. The study of parasitic diseases is called parasitology.</h3>
Your heart pumps red blood cells to your lungs to get rid of carbon dioxide and get oxygen in exchange, so respiratory problem could limit the amount of oxygen your red bloods cells can take in or the amount of carbon dioxide they can get rid of. It will make the heart beat faster to get the blood oxygenated.
