Neocoronavirus vaccine shot 3 does not usually affect the mammary glands. Neocoronavirus Vaccine 3 helps to increase the resistance to the new coronavirus. A small number of patients may experience allergic reactions such as skin itching, rash, fever, and cough after receiving vaccination 3 with the new coronavirus vaccine. Generally, it does not affect the mammary glands. If a woman develops breast swelling and pain after the third dose of the new coronavirus vaccine, it is recommended that she go to the hospital as soon as possible for ultrasound or mammogram to rule out the possibility of acute mastitis, hyperplasia, or other breast diseases. After receiving the new coronavirus vaccine, if the common adverse reactions do not subside after 3 days, or if there is any special discomfort, consult a doctor as soon as possible.