Vaccines are mainly categorized into inactivated vaccines, live attenuated vaccines, toxoid vaccines, subunit vaccines and so on. 1. Inactivated vaccines: common inactivated vaccines include inactivated polio vaccine, inactivated encephalitis B vaccine, influenza vaccine, rabies vaccine, inactivated new coronavirus vaccine and so on. 2. Live attenuated vaccines: common live attenuated vaccines include live attenuated measles vaccine, live attenuated hepatitis A vaccine, freeze-dried live attenuated varicella vaccine, live attenuated rubella vaccine, live attenuated mumps vaccine and so on. 3. Toxoid vaccines: common toxoid vaccines include tetanus vaccine and diphtheria vaccine. 4. Subunit vaccines: common non-cellular pertussis, new coronavirus recombinant subunit protein vaccine and so on. Different vaccines have different indications and contraindications, so it is recommended to consult your doctor carefully before vaccination.