Vaccines are like a training course for the immune system

Vaccines are like a training course for the immune system. They prepare the body to fight the disease without exposing it to disease syptoms. When foreign invaders such as bacteria or viruses enter the body, immunce cells called lymphocytes respond by producing antibodies which are protein molecules. These antibodies fight the invader known as an antigen and protect against further infection. According to the Centres fpr Dosease Cpmtrp; amd {revemtopm (CDC) a healthy individual can produce millions of antibodies a day, fighting infection so efficiently that people never even know they were exsposed to an antiben. Unrfortunately, the first time the body faces a particular invader, it can take several days to ramp up this antibody response.