Question
The baby, who is 10 months and a half, received the first dose of the A Group meningococcal vaccine. The doctor pointed out that one bottle of vaccine is intended for five children, and the baby received the last bit of the medicine. The parent is wondering: Does the extended opening time of the medicine or the purulent bottom of the medicine affect the vaccine’s effectiveness? If the first dose is not administered, will a supplement be given? What is the role of the second dose? Is it for reinforcement or to compensate for the unadministered first dose? Is it necessary to complete the A Group meningococcal vaccine within one year? The baby developed a fever and runny nose after vaccination, how should it be handled?
Answer
The A Group meningococcal vaccine is suitable for infants aged 6 to 18 months, with at least a 3-month interval between the first and second doses. The third dose is administered at 3 years old, with an interval of no less than 1 year from the second dose; the fourth dose is administered at 6 years old, with an interval of no less than 3 years from the third dose. The A+C Group meningococcal vaccine is suitable for individuals over 2 years old; if the A Group meningococcal vaccine has already been administered, the interval between the A+C Group meningococcal vaccine and the A Group meningococcal vaccine should be no less than 3 months. Individuals who have received two or more doses of the A Group meningococcal vaccine should have an interval of no less than 1 year between receiving the A+C Group meningococcal vaccine and their last dose of the A Group meningococcal vaccine. Following these principles, avoid re-administration of the A+C Group meningococcal vaccine within 3 years.