If the infectious disease has been cured after three days of cephalosporin administration, you can usually get the flu vaccine. If the disease is not under control, the vaccine should not be given. Meningococcal vaccine is used to prevent epidemic cerebrospinal meningitis caused by meningococcal infection. Determining whether or not you can get a rheumatic brain vaccine after taking Cephalosporin for three days depends on the actual situation and cannot be generalized. Cephalosporin belongs to the antibiotic class of drugs, indicating the existence of the body infection, if the infectious disease has been cured after taking Cephalosporin for three days, in general, you can play the rheumatic brain vaccine. However, if the disease is not under control after three days of taking Cephalosporin, it means that the disease is in the period of acute infectious attack, so it is usually not possible to take the vaccine, and it is necessary to postpone the time of vaccination. In addition, people who are allergic to the components of the vaccine, suffer from severe chronic diseases, or have active tuberculosis cannot receive this vaccine. To summarize, it is recommended that patients understand the contraindications and other related precautions before receiving the influenza vaccine, so as to avoid adverse effects.