Investigative and test 588 workers of 9 stone exploit and process companies in Binh Dinh finding out and define 19 of them (occupy 3,23%) get silico-pneumocosiosis main 1/10p type. Most of those workers were young, seniority low (6-20 years). People who working less than 5 years haven’t silico-pneumocosiosis. They were given CT-2002 muffler which according to standard of technical target. Filter performance get 85-87% with output 30l/minute. When ventilate output increase to 95l/minute. Performance reduce to 44-46,9%
Pneumoconiosis ; Occupational Medicine ; Occupational Health

As authorities braced for the arrival of the Omicron variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), infrastructure investments and government directives prompted action in central Viet Nam to establish capacity for genomic surveillance sequencing. From 17 November 2021 to 7 January 2022, the Pasteur Institute in Nha Trang sequenced 162 specimens from 98 150 confirmed SARS-CoV-2 cases in the region collected from 8 November to 31 December 2021. Of these, all 127 domestic cases were identified as the B.1.617.2 (Delta) variant, whereas 92% (32/35) of imported cases were identified as the B.1.1.529 (Omicron) variant, all among international flight passengers. Patients were successfully isolated, enabling health-care workers to prepare for additional cases. Most (78%) of the 32 Omicron cases were fully vaccinated, suggesting continued importance of public health and social measures to control the spread of new variants.