Taking vaccine is a cost/benefit tradeoff, even if the tradeoff is often lopsided in favor of vaccine. However, vaccine for incredibly rare or non-existent dis

Taking vaccine is a cost/benefit tradeoff, even if the tradeoff is often lopsided in favor of vaccine. However, vaccine for incredibly rare or non-existent disease isn't likely worth the tradeoff. Or maybe a particular vaccine is too dangerous or experimental. Anyway, if the CDC recommend a vaccine for something, it's likely that they had looked into it and decided that the upside is worth more than the risk.