2. The suspension of Johnson & Johnson vaccine is due to careful consideration, which can let relevant institutions know more about the situation of patients with adverse reactions and the mechanism of side effects. He said that the probability of this side effect is extremely low, so people who have been vaccinated with Johnson & Johnson vaccine need not be anxious, but should pay attention to whether there are severe headaches, shortness of breath, abdominal pain, leg pain and other symptoms within 3 weeks after vaccination. If there are serious side effects, seek medical attention in time.