If you take a preventive injection during a cough, it is likely to aggravate the cough or induce a fever. The body’s resistance during the cough is relatively weak, the vaccine is supposed to inactivate viruses, bacteria or toxins, these substances are prone to cause the body to produce some adverse reactions, such as rashes, fever, once the adverse reaction is very easy to aggravate the symptoms of cough. Cough during the virus or bacteria, the body’s immunity will also be abnormal, this time even if the vaccine, the normal antibody may not be able to produce, will lose the effect of vaccination. It is safer to wait 1-2 weeks for the cough to recover before taking the vaccination, so that the normal production of antibodies can be achieved and the effect of the vaccination can be realized.