An arguably rogue Doctor, once published an article/paper, stating that some vaccines cause young children to become autistic. It is widely/unanimously believed to be false/nonsense paper(s), with no scientific basis.
But sadly, as a result, some mothers refuse for their young children to get vaccinated. Sometimes with dreadful/bad outcomes.
The problem there was that the politicians came out and said that vaccination was perfectly safe. Immediately nobody believed them and started distrusting vaccination. Why, oh why, would the politicians pick this one occasion to come out and actually tell the truth.
But seriously. In the UK, trust of 'official sources' had become so eroded at the time that 'official pronouncements' on the vaccination issue were almost guaranteed to do more harm than good. We remember John Selwyn Gummer* feeding his little daughter hamburgers in front of the press at the time of the BSE crisis and we'd just had "weapons of mass destruction ready for use in 45 minutes" comprehensively debunked so anything that looked like a government cover-up was going to gain traction. After all, the government was behind the vaccination programme...
So the problem wasn't that one idiot put out fatally flawed theories about vaccination and autism, it was that 'authority' had so debased itself that it was powerless to counter his claims. Ironically it came down to "Who do you believe, a scientist or the government?". We now have a situation where children are again dying from measles because there's a multi-year immunity hole in the population.
*When he was Minister of Agriculture, Fisheries and Food.
Good point. I'd forgotten about that stuff. But now you mention it, it has brought all the memories back.
There is also the problem, that Governments have sometimes been accused of having the wrong views about some stuff. Then going round, asking different scientists, who will, for lots of (poor tax payers money), create a report, backing up the (probably mistaken) theories of government.
I.e. Like the classic saying (something on the lines of) "There are Lies, Really bad lies and then there are statistics ..."
If I remember correctly. During the first half of the (what you just brought up), "BSE crisis". Most/many people were avoiding Beef like the plague. Yet many sources were saying, there is no such thing as "BSE", DON'T WORRY!
I remember totally avoiding Beef and related products, like Beef stock cubes etc.
I have to admit, if when Scientists/Doctors, said something like "Don't worry, these types of proper steak Beef stuff are completely safe". I would still avoid them (as many other people did), if I remember correctly.
I guess once you have been told various Beef stuff are very dangerous, but some Beef stuff is safe, and seeing news programmes where someone had the BSE related illness, and the horrific symptoms, of basically being almost brain dead, while still alive. As I think it turns your brain into mush, or something.
I'm glad that illness has mostly/fully disappeared.
Yes, faith in Governments, is relatively low. Some sources say that is why, radically different governments, such as Donald Trump are getting rather successful. They say people want change.
Hence Brexit, as part of the same thing, I guess. But Brexit is highly complicated, so I could easily be wrong. I.e. there are roughly 25..30 million (people) sets of reasons, why Brexit was voted for.
If that girl/student in the OP's video, was just stating it as a discussion point. I don't think it would be too bad. The worrying aspect, was that she seemed to really and big time, believe in her, stuff. Even though a moderate knowledge of Science, would probably change a persons mind, about what she said.