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Secondhand Smoke a Danger to Health – Germany Must Take Action

German Cancer Research Center presents a new study

No. 71 | 07/12/2005 | by (MPL/JR)

Tobacco smoke in enclosed spaces is not simply a nuisance: it is a threat to health with fatal consequences. This is the conclusion reached by the German Cancer Research Center (Deutsches Krebsforschungszentrum, DKFZ) in its latest publication.

“Secondhand smoke contains not only poisons such as hydrocyanic acid, ammonia, and carbon monoxide, but also numerous carcinogenic substances including polycyclic aromatic hydrocarbons, N-nitrosamines, aromatic amines, benzene, vinyl chloride, arsenic, cadmium, chromium and the radioactive isotope polonium 210,” states Dr. Martina Pötschke-Langer, the editor of the publication. “For the carcinogenic substances contained in secondhand smoke it is impossible to determine threshhold values under which no health risk is to be expected. Even the slightest exposure can contribute to the development of tumors.”

In Germany, the level of pollution due to tobacco smoke is considerable: Each year more than 170,000 newborn babies have already been exposed in the womb to the harmful substances contained in tobacco smoke, and an estimated 8 million or more children and teenagers under 18 years old live in a household with at least one smoker. Among the adult population, more than 35 million nonsmokers are forced to inhale the harmful substances contained in secondhand smoke – at home, at work, or in their leisure time. At the workplace alone, about 8.5 million nonsmokers are still exposed to secondhand smoke.

Secondhand smoke irritates the respiratory tract and can lead to breathlessness during physical activity, increased susceptibility to infection, headaches and dizziness. Even a short exposure can elicit these symptoms. However, secondhand smoke is also a contributory factor in the causation of chronic and fatal diseases.

The joint authors of the study, the epidemiologists Professor Dr. Ulrich Keil of the University of Muenster and Professor Dr. Heiko Becher of Heidelberg University made the first ever calculation of the annual number of fatalities in Germany due to secondhand smoke: “Every year, secondhand smoke causes the deaths of an estimated 2140 nonsmokers due to coronary heart disease, 770 nonsmokers due to stroke, 50 nonsmokers due to chronic obstructive pulmonary disease, and 260 nonsmokers due to lung cancer. Approximately 60 infants die each year as a result of secondhand smoke in the household or from prenatal exposure to harmful substances, because the mother smoked during pregnancy,” explain Ulrich Keil and Heiko Becher.
The two epidemiologists emphasize: “In Germany, more than 3300 nonsmokers probably die each year as a consequence of exposure to secondhand smoke. This is a larger number of fatalities than the annual toll from illegal drugs, asbestos, BSE and SARS combined.”

Secondhand smoke is also a contributory factor in the occurrence of numerous non-fatal cases of coronary heart disease, stroke, and chronic obstructive pulmonary disease.
Dr. Martina Pötschke-Langer considers the present level of exposure of nonsmokers to tobacco smoke in Germany as inacceptable. In view of the estimated 3300 or more annual deaths and the countless persons who are ill because of secondhand smoke, it is urgent that a federal bill be introduced to ensure comprehensive protection of nonsmokers in public premises, including restaurants. An information campaign in Germany, drawing attention to the dangers of secondhand smoke would also contribute to reducing the number of victims. Germany needs to take action!

The publication “Passivrauchen - ein unterschätztes Gesundheitsrisiko“ (“Secondhand smoke – an underestimated health risk”) was authored by scientists from the German Cancer Research Center (DKFZ), Heidelberg, the Institute for Epidemiology and Social Medicine of the University of Muenster, and the Hygiene Institute of the Heidelberg University Hospital. It can be obtained as a pdf file from and in printed form from:

Deutsches Krebsforschungszentrum
WHO Collaborative Center for Tobacco Control
Fax: +49 6221 42 30 20
or by e-mail:

The German Cancer Research Center (Deutsches Krebsforschungszentrum, DKFZ) with its more than 3,000 employees is the largest biomedical research institution in Germany. More than 1,300 scientists at the DKFZ investigate how cancer develops, identify cancer risk factors and search for new strategies to prevent people from developing cancer. They are developing new methods to diagnose tumors more precisely and treat cancer patients more successfully. The DKFZ's Cancer Information Service (KID) provides patients, interested citizens and experts with individual answers to all questions on cancer.

Jointly with partners from the university hospitals, the DKFZ operates the National Center for Tumor Diseases (NCT) in Heidelberg and Dresden, and the Hopp Children's Cancer Center KiTZ in Heidelberg. In the German Consortium for Translational Cancer Research (DKTK), one of the six German Centers for Health Research, the DKFZ maintains translational centers at seven university partner locations. NCT and DKTK sites combine excellent university medicine with the high-profile research of the DKFZ. They contribute to the endeavor of transferring promising approaches from cancer research to the clinic and thus improving the chances of cancer patients.

The DKFZ is 90 percent financed by the Federal Ministry of Education and Research and 10 percent by the state of Baden-Württemberg. The DKFZ is a member of the Helmholtz Association of German Research Centers.


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