The following are helpful resources to read from Fr. Tad Pacholcyk, the Director of Education at The National Catholic Bioethics Center. They are regarding the growing concerns around vaccines and their tie to abortion, as well as concerns regarding the COVID-19 Vaccine.
Johnson & Johnson Covid-19 Vaccine
Vaccines and Other Entanglements with Abortion
Moral Reflections on Vaccines Prepared from Cells Derived from Aborted Human Foetuses
Instruction Dignitas Personae On Certain Bioethical Questions (see section 35)
Note on the morality of using some anti-Covid-19 vaccines