"Group 1";"There are observed data for various in size focal ”ground-glass opacifications” in the pulmonary parenchyma of segments 1, 2, 3, 4, 5, 8 and 9 bilateral, reaching subpleural areas and some delimited by the interlobar pleura. In segments 6 and 10 bilateral, changes with the same structure are seen, but with tendency for confluence and formation of patchy structure with underlined thickening of the inter-and intralobular septs. Widened bronchi and vessels in the affected regions of segments 6 and 10 are visible. The changes detected in the pulmonary parenchyma resemble atypical pneumonia with viral genesis. Lymph nodes are with size of 12 mm around the trachea and no data for pleural effusion are seen." "Group 2";"No CT data for enlarged lymph nodes bilateral are seen. In lungs, focal ”ground-glass opacifications” in the pulmonary parenchyma of segments 2 and 3 in the right side and segments 1, 2 and 4 in the left, situated axillary and reaching the subpleural zones and marked by the interlobal pleura is observed. Bilateral dorsal and peripheral axillar, mainly in segments 6, 9 and 10 extensive ”ground-glass opacifications” changes with crazy-paving, with marked thickening of the inter and intralobular septs are visible. Changes are marked by the interlobal pleura cranially. Mediastinum is without pathological changes with no significantly enlar-ged (above 10 mm) mediastinal lymph nodes. Trachea and main bronchi are clear, without data for compression or dislocation. Pleura is with no effusion. Spondylosis changes in the thoracic part of the spine are seen. CT data show changes in the pulmonary parenchyma indicative for atypical pneumonia with viral origin." "Group 4";"CT examination of the thorax detects various focal “ground-glass opacifications” with expressed thickening of the inter and intralobular septs in the lung parenchyma bilateral, in all segments, reaching the subleural zones and marked by the interlobal pleura, situated both centrally and peripherally. Tendency for merging of the separate foci exists. Data for early changes in the lung parenchyma representative for atypical pneumonia with viral origin are visible and no data for enlarged lymph nodes or pleural effusion are seen."