A little cough is not a good idea to take vaccinations. When there is a cough, it indicates the presence of inflammation, allergy or asthma in the respiratory system. Among them, inflammation may be caused by viral or bacterial infection, and the patient may have symptoms such as cough and runny nose, etc. If the vaccination is given at this time, it may aggravate the symptoms such as cold and fever. If the cough is caused by allergy or asthma, the patient may have symptoms such as difficulty in breathing and shortness of breath in addition to the cough, and vaccination at this time may induce an allergic reaction and increase the risk of adverse reactions. The body’s resistance is often weaker when coughing, especially for vaccinations with strong allergens such as measles vaccine and the mixed vaccine, so vaccination at this time may not produce sufficient antibodies in the body, which may affect the effect of the vaccination and increase the risk of adverse reactions. When you have a cough, it is recommended that the vaccination be administered after 1-2 weeks of complete recovery from the corresponding disease in order to reduce adverse reactions and to give better effect to the medicine.