If your child catches a cold after vaccination, you can usually take medication to treat it under the guidance of your doctor, and taking medication to treat a cold will generally not affect the effectiveness of the vaccine. Vaccines are a class of biological agents used to prevent disease, China will be divided into a class of vaccines and two types of vaccines, and a class of vaccines is the government to provide free vaccines, citizens need to be vaccinated in accordance with the relevant provisions. For children, they need to be vaccinated in time at the appropriate age. Some children may suffer from respiratory illnesses such as colds after vaccination, in which case they can be treated with medications (e.g., ibuprofen, oseltamivir, etc.) as prescribed by the doctor, and the use of such medications generally will not affect the effectiveness of the vaccine. However, if the cold is relatively mild, you may not use medication for the time being, as the cold itself is self-limiting and can be cared for by resting more, drinking more water, and eating a light diet to promote recovery. Although some anti-flu medicines or other symptomatic medicines can be taken to treat colds that occur after vaccination, it is important to follow the doctor’s instructions and not to abuse the medicines on your own.