Han took four nucleic acid tests and antibody tests, all negative, but passed the virus to her neighbor. Local health authorities later confirmed Han had been infected with the COVID-19. who was confirmed to be infected after negative test results at a hospital and the quarantine center.
Yang, as a virologist, noted that a new genotype of the virus could affect the effectiveness of China's test kits, which are developed based on virus types previously discovered in China.
people need to continue to wear masks if they want to work.
There also need to be regular sequencing of cases to look for mutations.
Also, I suggest more aggressive quarantine measures.
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