The best way to improve immunity in newborns is to eat right, get enough sleep, and get vaccinated on time, so that the child can produce effective protective antibodies on their own is the best way to improve immunity in newborns. Newborns are passively immunized by their mothers within 5 months, which improves the child’s ability to resist disease and their own immunity is relatively high. However, if the child has prematurity, low weight, intrauterine growth retardation, asphyxia and other risk factors, the child’s immunity is low and prone to disease. When the disease is critical, gammaglobulin can be ordered quietly to improve the newborn’s immunity and help the child survive the risk of disease. If the mother is infected with hepatitis B virus, the child needs to be injected with hepatitis B immunoglobulin after delivery in order to block the hepatitis B virus, so as to improve the child’s immunity to the hepatitis B virus and thus prevent the child from being infected, and such special cases can be treated with immunity-boosting drugs. However, if the child has no risk factors and is in good health, immunity-boosting drugs should not be used indiscriminately.