Cellphones' impact on human health has been lasting source of dispute for decades. Mobile phones use electromagnetic radiation in the microwave range. As such, the effect of cellphone radiation on human health is the subject of recent interest and study, as a result of the enormous increase in mobile phone usage throughout the world. Actually there are no final data validating or disproving the harm of the mobile phones.

Thus, in the year 2000 World Health Organization (WHO) published their recommendations on items of security of mobile phones for European Parliament. The recommendations noted that there aren't any conclusive evidences about the association of using the mobile phones and the development of cancerous and other serious diseases. Final conclusions are assumed to be done in accordance with the subsequent researches in the years coming in some countries of the world.

From 2004 a series of researches takes us through the possible effects of cell phone use on
your health.

• A Danish study (2004) that took place over 10 years found no evidence to support a link. However, this study has been criticized for collecting data from subscriptions and not necessarily from actual users. It is known that some subscribers do not use the phones themselves but provide them for family members to use. That this happens is supported by the observation that only 61% of a small sample of the subscribers reported use of mobile phones when responding to a questionnaire.

• A Swedish study (2005) that draws
       the conclusion that "the data do not support the hypothesis that
       mobile phone use is related to an increased risk of glioma or meningioma."
      

• A British study (2005) that draws the conclusion that "The study suggests that there is no substantial risk of acoustic neuroma in the first decade after starting mobile ph use. However, an increase in risk after longer term use or after a longer lag period could not be ruled out."

• A German study (2006) that states
       "In conclusion, no overall increased risk of glioma or meningioma was
       observed among these cellular phone users; however, for long-term cellular
       phone users, results need to be confirmed before firm conclusions can be
       drawn."

• A joint study conducted in
       northern Europe that draws the conclusion that "Although our results
       overall do not indicate an increased risk of glioma in relation to mobile
       phone use, the possible risk in the most heavily exposed part of the brain with long-term use needs to be explored further before firm conclusionsdrawn."[

Other studies on cancer and mobile phones are:

• A Swedish scientific team at the Karolinska
       Institute conducted an epidemiological study (2004) that suggested that
       regular use of a mobile phone over a decade or more was associated with an
       increased risk of acoustic neuroma, a type of benign tumor in the Brain. The increase was not noted in those who had used phones for fewer than 10 years.

• The INTERPHONE study group from Japan published the results of a study of brain tumour risk and mobile  phone use. They used a new approach: determining the SAR inside a tumour by calculating the radio frequency field absorption in the exact tumour  location. Cases examined included glioma, meningioma, and pituitary adenoma. They reported that the overall odds ratio (OR) was not increased and that there was no significant trend towards an increasing OR in relation to exposure, as measured by SAR.