The dominant N501Y mutation in the spike protein that SARS-CoV-2 virus uses to bind to the human ACE2 receptor were found in the UK, which has aroused global concern and worried. Mutations in spike protein may, in theory, result in more infectious and spreading more easily. In order to evaluate the broad-spectrum protective effect of the monoclonal antibodies(mAbs), we compared the neutralization activities of six prepared mAbs against SARS-CoV-2 with pseudovirus neutralization assay. Only one of them showed a decrease of 6 folds in neutralizing activity to N501Y mutant strain, compared with the wild type strain. We should continue to monitor emergence of new variants in different regions to study their infectivity and neutralization effect.

Yellow fever (YF) is an acute infectious disease caused by yellow fever virus (YFV), which is one of the three infectious diseases of international health regulations. We tested people from epidemic areas of Tianjin port in 2014 to investigate the prevalence and distribution characteristics of yellow fever virus antibody. 192 samples were collected and the positive rate of yellow fever virus antibody was 22.92%. The positive rates among different countries, genders, ages, occupations and entry time were calculated and analyzed. There were significant difference in the detection rate of YFV antibody among people with different age groups and occupations. The positive rate of people >40 age and workers engaged in labor were relatively high and had statistical significance compared to other groups.

With the application of new technologies in development and production, the quality of vaccines in China had been constantly improved, and vaccines manufactured in China were being supplied to international markets while meeting the domestic immunization program need. Meanwhile, the quality management performance of vaccine manufacturers in China was continually improving. The implementation of the Vaccine Administration Law of the People’s Republic of China had imposed legal systematic requirements on full lifecycle management of vaccines in development, production and supervision, which was of important milestone significance for guiding the development of China’s vaccine industry. Based on the understanding of this law, this article had discussed quality management of vaccines from four aspects including biosafety, application of new technologies for vaccine development and production, process changes and deviation management with practical work taken into account, intended to arouse readers’attention and discussions on this law and relevant issues and provide reference to vaccine manufacturers in production, development and product quality improvement.

Coronavirus (CoV), is a single-stranded positive-sense RNA virus, which is characterized by a coronal-shaped spinous process on its surface and is the largest known RNA virus. Recently, the new outbreak of CoV was first found in Wuhan, China at the end of 2019, however, the infection is worldwide and causing high pathogenicity and mortality rates, especially in the aged population. Unfortunately, there is no available strategy to control the infection or treat patients. By reviewing the life cycle of CoV infection in host cells, including: virion attachment and entry, genome transcription and replication, and virion assembly and release, we focused on the role of viral proteins in the viral life cycle and summarized how their function could be targeted for the prevention/therapy of CoV. Thus, this information would pave the way to precisely design the antiviral drug component/vaccine against CoVs.