People are not really harmed by vaccines outside the rare allergic reaction.
I've heard of a problem with babies getting a high fever that causes brain damage and stunted immune system. Could be FUD but I don't see the motive. Imo the're mostly just pointless.
More han likely FUD. I dont get the motive, but there is FUD against vaccines. They really are the most effective, and cheapest way to fight the spread of many diseases.
If you want to sell something, get really good at technical analysis and assessing sentiment, release PR when the trend reverses, then claim your product's influence was the reason.
I'm not sure that's been qualified either. The trends match but it might've just been good timing on the part of the marketers. I think news affecting markets is largely a myth.