In the case of a cold, it is not a matter of how many days you are off your medication, but rather how long you have been recovering from the cold that determines which day you should take your immunization. In general, it is safer to wait a week or so after the symptoms of a cold have fully recovered before taking a vaccination, and it is not safe to take a vaccination during a cold, as it carries a certain degree of risk. First of all, the vaccine is an inactivated virus, bacteria or toxin, which can easily lead to an immune response after entering the body, making it easier to develop a fever or infection. Secondly, during a cold, the resistance is weaker, and it is more likely that some of the above situations will occur at this time. Again, the body’s immunity is not normal during a cold, which may not be conducive to the production of antibodies, and then lose the effect of vaccination, so you need to wait until the cold has recovered for a week before you take a vaccination. It is also not recommended to give vaccinations in cases other than colds, such as fever or other discomforts.