On June 21, local time, phase III clinical fieldwork of the Inactivated COVID-19 Vaccine (Vero cells) independently developed and manufactured by Shenzhen Kangtai Biological Products Co., Ltd. was officially initiated in Malaysia, and the first batch of enrolled subjects was vaccinated on-site. In February this year, BIOKANGTAI and Malaysia's Yong Tai Berhad signed an Agreement on Phase III Clinical Trial of Inactivated COVID-19 Vaccine and Product Procurement, reaching a consensus to further carry out the phase III clinical trials and commercialization of the agreed products in Malaysia. On May 31, the National Pharmaceutical Regulatory Agency (NPRA), Malaysia, approves the clinical trial of the vaccine. Subsequently, on June 11, clinical samples of the vaccine were delivered from Shenzhen, China to Malaysia. In May 2021, the BIOKANGTAI Inactivated COVID-19 Vaccine was granted the Emergency Use Authorization (EUA) in China, making it the sixth COVID-19 vaccine variety approved in China and also the first COVID-19 vaccine variety approved in Guangdong province. Since the commencement of the large-scale vaccination of the vaccine on June 1, the cumulative dose of vaccination has reached millions, according to the statistics of local regulatory authorities, its adverse reaction rate is much lower than the average level, showing its excellent safety. In addition, according to the data of phase I/II clinical trials published on the medRxiv platform and in the National Medical Journal of China, in the phase II clinical trial of the vaccine, the geometric mean titer of neutralizing antibody against the vaccine virus in the vaccine group on day 0-28 of the immunization program is 2.65 times of that of the serum neutralizing antibody of the convalescents, with an expected protection rate of more than 90%.