Does getting vaccinated or having an ınjection break the fast? Does receiving a vaccine or an injection invalidate the fast? Does being vaccinated or having an injection invalidate fasting? Can a vaccination or injection break the fast?
Fasting is invalidated by eating, drinking, having sexual intercourse and things within the scope of these. Accordingly, vaccines with no nutritive feature do not invalidate fasting.
Patients with continuing treatment may delay fasting until recovery and end of the treatment. However if they want to fast together with everyone in Ramadan and do not have any other serious obstacle to do so, it is appropriate for them to have injections after iftar. Those who do not have such an opportunity may have injection of treatment and vaccination. However, the fast of those who have nutrition and vitamin vaccines, vaccined by mouth, and to whom serum and blood is given, is invalidated. They need to perform qada for the day later.
Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS