The new coronavirus vaccine generally refers to the new coronavirus vaccine, and the main type of vaccination in China is inactivated new coronavirus vaccine, whose excipients mainly include disodium hydrogen phosphate, sodium chloride, sodium dihydrogen phosphate, aluminum hydroxide, etc. If a patient is allergic to any of the components of the vaccine, he or she is not suitable for the new coronavirus vaccine to avoid allergic reactions that may lead to serious consequences. In addition, since the drugs that patients usually use do not contain vaccine components, patients who are allergic to drugs in general can receive the new coronavirus vaccine. For example, patients who are allergic to penicillin can receive the new coronavirus vaccine normally because the new coronavirus vaccine does not contain penicillin-like components. In addition to the above, some patients are not recommended to receive the new coronavirus vaccine, such as patients with allergies, patients who have had severe allergic reactions to the new coronavirus vaccine in the past, patients with fever or during pregnancy, and patients with acute illnesses or chronic illnesses. Therefore, if a patient intends to receive the new coronavirus vaccine, he or she should ask his or her doctor in detail before receiving the vaccine to avoid unnecessary hazards. After receiving the new coronavirus vaccine, some patients may experience mild fever and other uncomfortable symptoms, at which time they can take sufficient rest to promote recovery. If the symptoms are severe, immediate medical attention is required to avoid adverse consequences.