The flu vaccine : 

The flu vaccine is a vital tool for preventing a common seasonal respiratory illness that spreads easily among people. Because the viruses responsible for this illness change frequently, the vaccine is updated each year to target the most prevalent strains, enabling the immune system to recognize and combat the infection effectively. By stimulating the body to produce protective antibodies, the vaccine reduces both the risk of contracting the illness and the severity of symptoms if infection occurs. It is especially recommended for vulnerable groups such as the elderly, young children, pregnant women, and individuals with chronic health conditions. In addition to protecting individuals, widespread vaccination helps slow the spread of the virus within communities, contributing to better overall public health.