Regarding the issue of vaccination against A

Patient's question:

[Description of illness for one and a half months: My baby is 10 and a half months old and received the first dose of A vaccine. The doctor said one bottle of vaccine is for five children to use. My baby received the last bit of the vaccine. I want to ask, if the vaccine has been open for a long time or if the bottom of the vaccine is affected, will it affect the effectiveness? If the first dose isn't taken, will the second dose be? What is the of the second dose? Is it to strengthen the immunity or to prevent the need for again if the first dose didn't take? Must the two doses of be completed before the baby is one year old? My baby had a slight fever after receiving the shot, with a high temperature of 38 degrees, and also had a bit of a runny nose. What should I do?
History of treatment and effectiveness: No medication was used; just more water was given.
Help needed: My baby is 10 and a half months old and received the first dose of A vaccine. The doctor said one bottle of vaccine

Doctor's answer:

A:Infants should receive the first and second doses between the ages of 6 and 18 months, with an interval of no less than 3 months between doses; the third dose should be administered at age 3, with an interval of no less than 1 year from the second dose; the fourth dose should be given at age 6, with an interval of no less than 3 years from the third dose.
A+C:The target population is individuals aged 2 and older; those who have received one dose of A should wait at least 3 months before receiving A+C; individuals who have received two or more doses of A should wait at least 1 year after the last dose before receiving A+C; following these principles, A+C vaccine should not be repeated within 3 years.

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