Yes, you can get a flu vaccine and the COVID-19 booster while on antibiotics. If your doctor invites you to get a vaccine, please go, even if you are taking antibiotics.
Research by the British Medical Journal reported “administering an influenza vaccine at the same time as a second dose of a COVID-19 vaccine produced no safety concerns and preserves the immune response to both vaccines”. Furthermore, The Department of Health has also stated that it is safe to have both the COVID-19 vaccine and flu vaccine at the same time. Some people may wish to have them on different days which is also ok.
Antibiotics are safe to take alongside both the flu and COVID-19 vaccines. Both vaccines trigger the body’s natural production of antibodies and stimulate immune cells to attack and neutralize the virus. Therefore, taking antibiotics will be unlikely to have an effect on the effectiveness of the vaccine. It will still be able to stimulate the immune system. Antibiotics are used to treat bacterial infections and have no effect on the virus or your immune response to the vaccine.
If you are feeling ill or suffering from any symptoms of an active infection, speak to your GP. Always speak to your doctor for specific advice.