The New Crown Vaccine booster is a recombinant protein New Crown vaccine, which is the third dose and is useful against the Omicron strain. The New Crown vaccine booster is primarily to increase the preventive effect of the vaccine. Usually after 6 months of the second shot, the level of immunity in some people’s bodies decreases as the period of time lengthens. At this point, if a booster shot is administered, the vaccine immunization effect can be enhanced to prevent the effects of the Omicron strain. It is important to remain under observation for more than 30 minutes after vaccination. Some people may have adverse reactions such as fever after vaccination. Seek treatment from a doctor if there is any adverse reaction. Meanwhile, the injection site should not be exposed to water or strenuous exercise on the same day. For more information about vaccination, please consult your doctor. In addition, if you feel unwell after the booster injection, go to the hospital for treatment.