Notes: An extensive study on the indoor activity concentrations of radon in the Republic of Moldova has been carried out during 2019 year in the scope of a lung cancer epidemiological study using RADTRACK2 detector donated by the International Agency of Atomic Energy. Two thousand five hundred dwellings of different types, located in North, Centre and South Zone of the country were selected for the measurement. The detectors were ﬁxed 2 m above the ﬂoor. After an exposure time of 3 months (90 d), detectors have been collected. The information (radon concentration) has been read in RADONOVA laboratory, Uppsala, Sweden. The concentrations of radon were evaluated. In order to carry out the investigations/survey were elaborated: Requirements for placing the detectors; Questionnaires to identify housing conditions; Agreement between investigators and the owner of the home; the questionnaire for assessing the population's knowledge regarding radon.
  