More Studies Showing Effectiveness of Negative Ions

U.S. Dept. of Agriculture
A recent study by the U.S. Dept. of Agriculture found that ionizing a room led to 52% less dust in the air, and 95% less bacteria in the air (since many of the pollutants found in the air reside on floating dust particles). 

The USDA also performed another study to test the effectiveness of negative ionization at removing airborne Salmonella Enteritidis. The negative ions drastically reduced the airborne salmonella particles, prompting the following statement from the USDA:
"These results indicate that negative air ionization can have a significant impact on the airborne microbial load in a poultry house and at least a portion of this effect is through direct killing of the organisms."

Agriculture Research Service (of USDA)
The Agriculture Research Service of the U.S. Dept. of Agriculture tested the effectiveness of ionizers for removing dust in a poultry hatchery. The dust level is very high in such an environment. In this study, the use of an ionizer resulted in dust removal efficiencies that averaged between 81.1 ~ 92.2%. The airborne transmission of salmonella (to the eggs) was also significantly reduced as a result. 

Journal of Hygiene
Scientists showed that ionization reduced bacterial levels in burns and plastic surgery units by over 96% after a two week period, which results in much better and more rapid healing of patients.

Journal of Applied Microbiology
The use of negative ions was even found by scientists to reduce the presence of airborne viruses by about 40%. A study featured in the 1987 issue also showed the negative ions are free from any adverse side effects.

Science
A 1976 study featured in this publication provided evidence that negative ions can have a biologically lethal effect on airborne micro organisms.

Journal of Hygiene
A 1979 study found that using negative ionization in the air protected chickens from airborne infection of the deadly Newcastle Disease Virus.

Journal of Food Protection
A 2001 study found that airborne negative ionization was highly effective at destroying airborne and surface salmonella.

University of Medicine and Pharmacy (Romania)
A test on male rats showed that just moderate levels of negative ions increased the resistance of the rats, reducing or eliminating the effect of some chemicals.

Effect of Negative Ions on Drivers
A study by Toyota Central R & D Labs, Inc. found that negative ions can improve fatigue and cognition of drivers.

Negative Charged Ions are Effective in Treating Cancer (Cited from High-Voltage Treatment published by Youth Publishing)
In 1950, Dr. Haskell applied Negatively Charged Ions to patients of Hypertension. Amazingly, Negative Ions were proven to have a positive effect in lowering one's blood pressure, while no beneficial effects were observed with Positive Ions. Negative Ions are also effective against influenza, asthma and especially bronchial disease. Another study done by the University of Frankfurt involved a "Cancer Team" in order to further study the physical effects of Negative Ions to cancer cells. Different types of cancer cells were transfused into the bodies of mice. In order to have a base of comparison, one group of mice were put into a negative ion environment each day while the other group remained untouched. As a result, the mice in the negative ion environment lived, on average, for 59 days, while the mice that were untreated lived no longer than 34 days. The mice from the experimental team lived 25 days longer; some even lived as long as 80 days! The experiment's result confirm the effectiveness of Negative Ions in treating cancer.