The immune system is made up of specialized cells and proteins. Some of these specialized cells include white blood cells such as lymphocytes (B cells and T cells) and phagocytes (neutrophils, monocytes, and macrophages). White blood cells are produced in the bone marrow. The complement system is a group of proteins found in the blood that are critical in defense against infection. When the immune system is missing any of these parts, people are vulnerable to specific types of diseases.
1 Depending on the brand and the type of humidifier, the costs of a humidifier are going to range anywhere from as little as $15 to as much as $150.2  Generally, table top humidifiers are going to be less than $50 while larger humidifiers that work up to 2,000 square feet can cost up to $150. Depending on the brand and the type of humidifier, the costs of a humidifier are going to range anywhere from as little as $15 to as much as $150.
Often times, labor costs range between an additional $150 and $200 and the installation itself takes between two and three hours. Finally, homeowners should be expected to pay around another $25 to $50 for the materials required to properly install the humidifier.ften times, labor costs range between an additional $150 and $200 and the installation itself takes between two and three hours. Finally, homeowners should be expected to pay around another $25 to $50 for the materials required to properly install the humidifier.