stroke; Revaccination with different COVID-19 Vaccine; Interchange of vaccine products; This spontaneous case was reported by a consumer and describes the occurrence of CEREBROVASCULAR ACCIDENT (stroke) in a female patient of an unknown age who received mRNA-1273 (Spikevax) for COVID-19 prophylaxis. The occurrence of additional non-serious events is detailed below.    Co-suspect product included non-company product TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) for an unknown indication.    No Medical History information was reported.   On an unknown date, the patient received dose of mRNA-1273 (Spikevax) (unknown route) 1 dosage form and dose of TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) (unknown route) 1 dosage form. On an unknown date, the patient experienced CEREBROVASCULAR ACCIDENT (stroke) (seriousness criterion medically significant), COVID-19 IMMUNISATION (Revaccination with different COVID-19 Vaccine) and INTERCHANGE OF VACCINE PRODUCTS (Interchange of vaccine products). At the time of the report, CEREBROVASCULAR ACCIDENT (stroke), COVID-19 IMMUNISATION (Revaccination with different COVID-19 Vaccine) and INTERCHANGE OF VACCINE PRODUCTS (Interchange of vaccine products) outcome was unknown.        The action taken with mRNA-1273 (Spikevax) (Unknown) was unknown.       No concomitant medications were reported.  Caller stated that patient had Pfizer and Moderna vaccines and experienced 12 strokes after vaccination.  No treatment medications were reported.  Company comment: This spontaneous case concerns a female patient of unknown age with no reported medical history who experienced the unexpected serious (medically significant) adverse event of special interest cerebrovascular accident which occurred at an unknown interval after receiving a dose of mRNA1273. The patient also reported to have received a dose of different COVID-19 vaccine (PfizerBiontech) at an unspecified date prior to the latest dose of mRNA1273 (interchange of vaccine products). The patient claimed experiencing 12 strokes after receiving the vaccine. Further details regarding the clinical course, additional diagnostic or imaging test done, concomitant medications and treatment were not provided.  The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.   This case was linked to US-MODERNATX, INC.-MOD-2022-626472 (E2B Linked Report).; Sender's Comments: This spontaneous case concerns a female patient of unknown age with no reported medical history who experienced the unexpected serious (medically significant) adverse event of special interest cerebrovascular accident which occurred at an unknown interval after receiving a dose of mRNA1273. The patient also reported to have received a dose of different COVID-19 vaccine (PfizerBiontech) at an unspecified date prior to the latest dose of mRNA1273 (interchange of vaccine products). The patient claimed experiencing 12 strokes after receiving the vaccine. Further details regarding the clinical course, additional diagnostic or imaging test done, concomitant medications and treatment were not provided.  The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report. US-MODERNATX, INC.-MOD-2022-626472:Same reporter