The latest test results of the two Russians, who again tested positive for the coronavirus SARS-CoV-2 after they were given the all-clear, turned out negative, the Health Department of southern Ba Ria-Vung Tau province announced on January 12.
Wakamono, a Ho Chi Minh City-based company that specialises in producing nano biotech materials, has invented a medical mask that is capable of killing more than 99 percent of both gram-negative and -positive bacteria, and enveloped and non-enveloped virus.