Booster dose意思

"Booster dose" is a term used in the context of vaccination to refer to an additional dose of a vaccine administered to someone who has already received the standard course of vaccination. The purpose of a booster dose is to enhance or "boost" the immune response and provide longer-lasting immunity or higher protection against a disease.

For example, many vaccines, such as those for measles, mumps, and rubella (MMR), are given in multiple doses over time to ensure that the recipient develops a strong and sustained immune response. A booster dose may be recommended several years after the initial vaccination series to maintain immunity, especially for vaccines where protection can wane over time.

In the case of COVID-19 vaccines, booster doses have been discussed and implemented in some countries for certain populations, such as the elderly or those with compromised immune systems, to provide additional protection against the virus, especially in light of new variants that may be more transmissible or evade some of the immunity provided by the initial vaccine series.

It's important to note that the need for and timing of booster doses can vary depending on the vaccine, the individual's health status, and the disease in question. Always consult with a healthcare provider or follow the guidelines provided by public health authorities for the most accurate and up-to-date information regarding booster doses for specific vaccines.