AM radio is 540 KHz to 1.7 MHz... In this case, the frequency was 910 KHz...

Microwave oven is operating at 2450 MHz.... (2.45 GHz). All of the difference in the world...

See the following from World Health Organization...

Exposure to RF fields and cancer: Current scientific evidence indicates that exposure to RF fields is unlikely to induce or promote cancers.

* Cancer studies using animals have not provided convincing evidence for an effect on tumour incidence. A recent study found that RF fields, similar to those used in mobile telecommunications, increased the incidence of cancer among genetically engineered mice that were exposed near (0.65m) an RF transmitting antenna. Further studies will be carried out to determine the relevance of these results to cancer in human beings.

* Many epidemiological (human health) studies have addressed possible links between exposure to RF fields and excess risk of cancer. To date these studies do not provide enough information to allow a proper evaluation of human cancer risk from RF exposure because the results of these studies are inconsistent. This can be explained by differences in the design, execution and interpretation of these studies, including the identification of populations with substantial RF exposure and retrospective assessment of such exposure. The International EMF Project is encouraging coordinated research in this area.

Exposure to RF fields may cause heating in body tissues. Heating is the primary interaction of RF fields at high frequencies, above about 10 MHz.

A scientific review by WHO, held under the International EMF Project (Munich, November, 1996), concluded that, from the current scientific literature, there is no convincing evidence that exposure to RF shortens the life span of humans, induces or promotes cancer.

For further information, please contact the Office of Press and Public Relations, WHO, Geneva. Telephone (41 22) 791 2599. Fax (41 22) 791 4858. Email: info@who.int