Anhui Zhifei, or Anhui Zhifei New Coronavirus Vaccine, does not require a fourth dose for the time being. Anhui Zhifei New Coronavirus Vaccine is a recombinant subunit New Coronavirus vaccine produced by Anhui Zhifei Longkema Biopharmaceutical Co. It is a recombinant subunit Neocoronavirus vaccine. The vaccine is usually given in three doses, and a fourth booster is not required for the time being. Recipients should note that they should try to complete the vaccination on the scheduled date. Usually, the interval between two vaccinations should be greater than or equal to four weeks, and the second vaccination should be completed within eight weeks and the third within six months after the first vaccination. After receiving the Anhui Zhifei New Coronavirus Vaccine, recipients are required to remain under observation for thirty minutes and keep the area as dry and clean as possible for 24 hours after vaccination to avoid skin infections. In case of allergy, fever, local swelling and other adverse reactions, it is recommended to consult a medical professional in a timely manner, and under the guidance of the doctor to the actual situation of the treatment.