Question
After receiving the second dose of the hepatitis B vaccine at a health clinic, parents noticed that the vaccine production batch number on the “Child’s Preventive Vaccination Certificate” differs from the first dose. The first dose is marked as “200910A3103,” while the second dose is “20080719-4.” The parents are puzzled by the difference in batch numbers and want to know how to check the vaccine’s expiry date.
Answer
Different batch numbers for vaccines are a normal occurrence as long as the vaccine production unit remains the same. If parents have questions about the vaccine’s expiry date and production date, they can inquire with the vaccination staff and request detailed information about that batch number, including the production date and expiry date. Moreover, parents can rest assured that if a vaccine has expired, medical personnel will not choose to use it.