Drowsiness and sleepiness after vaccination are mostly adverse reactions to the vaccine, which will be gradually relieved in 3-7 days in general. However, the recovery time varies depending on the patient’s physical condition, for example, some patients can recover in 1 day after proper rest, while some patients may recover more slowly and gradually return to normal within 7 days. Some patients may experience mild fever, fatigue, drowsiness, abdominal pain, diarrhea, rash and other symptoms after the injection of New Crown vaccine, which are normal. However, if patients have obvious symptoms such as high fever, rash, skin redness and pain, they may have an allergic reaction to the vaccine; or if the symptoms of drowsiness are obvious after vaccination and do not ease or even continue to worsen after rest, they need to seek medical attention promptly and carry out symptomatic treatment after clarifying the cause. Vaccinators are advised to avoid staying up late and strenuous exercise before and after vaccination, to eat a light and nutritious diet, to eat fresh fruits and vegetables, and to avoid spicy and oily foods to reduce the occurrence of adverse reactions and to help bring out the efficacy of the vaccine.