Correlation and causation are two different things. However, this is a non-FDA approved EUA that effects are not wholly understood. If the doctors can hand out a flyer that says among other things, do not eat certain lunch meats, do not drink herbal tea some herbs wouldn't be good for baby, do not eat certain unpasteurized or whatever the frick cheeses, refrain from caffeine women and their doctors should be using common sense, not this particular vaccine. This is really easy!