This paper proposes a new methodology to better assess indoor RF-EMF exposure in buildings near telecommunication base station antennas by refining measurement-point selection. Implemented in four multi-storey buildings in Natal, Brazil, indoor electric field peaks and averages were reported to be substantially higher than ground-level measurements. Although the highest indoor levels remained below ICNIRP recommended limits, the authors argue current regulatory evaluation methods may underestimate indoor exposure in certain building locations.

This ecological analysis used a public health database of myocardial infarction admissions in São José dos Campos, Brazil (1998–2005) and categorized geomagnetic activity using the planetary Kp index. The abstract reports a higher relative frequency of MI admissions during disturbed geomagnetic conditions compared with quiet periods, with a stronger association in women. Unsupervised k-means clustering reportedly supported the sex-specific pattern.