RADAR SYSTEMS OF SPECIAL PURPOSE AS POWERFUL SOURCES OF ELECTROMAGNETIC RADIATION IN THE ENVIRONMENT

The work contains the results of the electromagnetic radiation at the location sites of the radio-engineering means for special purpose and the effect of this factor on health. The space – time dissemination appropriatenesses of the electromagnetic radiation of the circular scanning radar of Dalemir type and vertical scanning radar of Vysotomir type have been determined with the help of personal elaborations and modern methods of the investigation. It was established that a real energetic charge on the family members and civil population living in the military settlements is greater nearly by 20 fold than for specialists supplying the radio-engineering means. This category of the population is a contingent of the elevated risk. The results of the biological and hygienic studies fulfilled on the laboratory white rats testifies that the electromagnetic radiation of the radio-engineering means for special purpose in different periods of the experiment causes the changes in the indices of nervous system, biochemical process of the immune system, reproductive function. On the basis of the fulfilled study the following hygienic standards for the population have been recommended: for the circular scanning radars – 15 W/cm2 at 24 hours object radiation and – 40 W/cm2 at 8 hours object radiation, and for vertical scanning radar – 10 and 30 W/cm2 correspondently this. Other measures on the population health protection have been elaborated.

Association of COVID-19 Infections in San Francisco in Early March 2020 with Travel to New York and Europe

Real-time dissemination of epidemiological survey data from positive COVID-19 cases is critical to support efforts to contain or reduce spread of viral infection in the community. Here we detected a significant association between domestic travel or travel to Europe and the identification of new cases in San Francisco, California, USA. These findings suggest that domestic and European travelers may need to be prioritized for evaluation of acute infection from COVID-19 in the setting of limited testing capacity.