Why are booster shots not allowed during breastfeeding?

In general, a booster shot refers to an additional dose of the COVID-19 vaccine. Nursing mothers are advised not to receive the booster shot to avoid potential effects on their infants. The detailed explanation is as follows:

The COVID-19 vaccine booster shot is administered after completing the initial vaccination series, based on the waning level of antibodies, in order to maintain the body's immunity against the SARS-CoV-2 virus. Current research data cannot definitively confirm that administering the COVID-17 vaccine booster to lactating women has no effect on their babies. Therefore, the possibility of adverse effects on newborns cannot be entirely ruled out, and thus nursing mothers are generally not recommended to receive the COVID-19 vaccine booster.

In addition, individuals suffering from severe illnesses, acute exacerbations of chronic diseases, influenza, or similar conditions should ideally wait until they have fully recovered before receiving the COVID-19 vaccine booster. If severe cold-like symptoms occur after the booster shot, further injections should be postponed to prevent adverse reactions and ensure optimal effectiveness of the booster vaccination.

It is recommended that nursing mothers receive the COVID-19 vaccine booster after finishing breastfeeding. Specific vaccination arrangements should be determined based on individual health conditions and local vaccination guidelines.