This is a difficult question to answer with certainty. I presume by FFA you are referring to frontal fibosing alopecia. At this point, the answer to the question as to whether or not Covid-19 vaccinations might cause flares of autoimmune disease activity is still not known. Currently, there is no evidence that vaccinated patients in the trials experienced new onset autoimmune disease. However, we do know that Covid-19 vaccinations occasionally cause significant swelling of dermal fillers, likely as a result of a pro-inflammatory effect. The good news is that these episodes of inflammation have reverted to normal within a few days, so the duration of the inflammation was self-limited. Theoretically, there may be a small risk that vaccinations might cause a flare of interferon-mediated diseases, which would include frontal fibrosing alopecia and lichen planopilaris, as well as conditions like lupus and rheumatoid arthritis. Realistically, the risk is likely very small and if the FFA does flare, it should be controllable and likely fade quickly, although data is very limited right now. At this point, the benefits of Covid-19 vaccination are massive, and the possibility of a flare is small. Despite this, it is still early on and I'm not sure anyone can answer this question with absolute certainty yet.