Beijing Kexing and Beijing Biological refers to the new crown vaccine manufacturers, the two production of the new crown vaccine belongs to the new crown virus inactivated vaccine, with basically the same effect, and there is no which one is better. Beijing Kexing vaccine and Beijing biological vaccine are approved by the state listed inactivated vaccine of the new coronavirus, the dosage form, the number of times of vaccination, the role of basically the same, but only in the manufacturer, the time to market and so on there is a certain difference, but the vaccine safety and effectiveness are guaranteed, and there is no which one of the vaccine is better, you can rest assured that you can choose one of the inoculation. New crown inactivated vaccine inoculation may appear inoculation site redness, swelling, pain and other adverse reactions, usually in 2 ~ 3 days after the self-relief. After vaccination, you should also keep the vaccination site clean and hygienic, and avoid spicy and allergic foods, so as not to aggravate the adverse reaction.