Current recommendations state injectable vaccines for cats should only be administered low on their legs, because if a tumor developed in this location, amputation could cure the issue. (animalsheltering.org)
But even non-adjuvanted injectable vaccines are not risk - free. (2ndchance.info)
Injectable vaccines often require trapping the animal — a costly endeavor that's stressful and dangerous for both wild animals and the humans doing the vaccinating. (sciencenews.org)