evidence: Misrepresents source: The fact that vaccine package inserts state a vaccine hasn’t been tested for carcinogenicity or mutagenicity doesn’t mean we have no data on whether vaccines cause cancer. Such tests weren’t performed because the safety of these vaccines had already been demonstrated through data acquired earlier, and vaccine ingredients aren’t present in quantities that pose a cancer risk. In January 2024, political commentator and talk show host Candace Owens posted a tweet on X (formerly Twitter) claiming that vaccine package inserts state vaccines haven’t been tested for carcinogenic or mutagenic effect, that there has been an "explosion" of childhood cancers after manufacturers were removed from liability, and that "vaccines can cause childhood cancers". [...] To sum up, the reason why vaccine package inserts state that "the vaccine has not been tested for carcinogenic or mutagenic effect" is because there’s no scientific grounds to think the vaccine would cause either effect. Childhood vaccines don’t use novel adjuvants or additives and vaccine ingredients aren’t present in quantities that are expected to cause cancer, based on previous research.