No. The foetal cells were used only to begin the cell strains that were used in the preparation of the vaccine virus. Since that time (the early 1970s) the cell lines have grown independently. The descendant cells are not the cells of the terminated foetus. There has been no further use of foetus cells to develop the vaccine.
The cell‐lines used in Vaxzevria® (AstraZeneca) are HEK (human embryonic kidney) 293 cell lines, which were started in the 1970s using small quantities of kidney cells taken from a foetus following a termination. The termination was legal and agreed to by the mother, and it was not performed for the purpose of vaccine development.
The original foetal cells have long since disappeared. None of these cells remain at the time the vaccine is administered.
Other vaccines are developed using cell lines that were originally of foetal origin e.g. MMR vaccine.
The Irish Catholic Bishops Conference has released a statement that it is morally permissible for Catholics to accept a vaccine which involves the use of foetal cell‐lines, especially if the potential risk to life or health is significant, as in the case of a pandemic. Read the full statement on the Catholic Bishops Website