I received a vaccine after being bitten by a dog before. Do I need to get vaccinated again if bitten once more?

The term "vaccine" here generally refers to the rabies vaccine. Whether another rabies vaccination is needed after being bitten by a dog again, following a previous vaccination due to a prior dog bite, usually depends on the timing of the last vaccination.

After being bitten by a dog, if the person has previously received the rabies vaccine, the management plan should be determined based on when the last dose was administered. The rabies vaccine provides effective protection for about 3 months, and protective antibodies may persist to some extent for up to 3 years. If a person is bitten again within 6 months after completing the full vaccination series, re-vaccination is generally not required. If bitten between 6 months and 1 year after full immunization, one should receive a booster dose on day 0 and day 3. If bitten between 1 and 3 years after full immunization, booster doses should be given on days 0, 3, and 7. If bitten more than 3 years after completing the initial series, a complete new course of rabies vaccination is required.

For more specific recommendations, individuals should consult a healthcare professional.