It seems the science changes by the day/month/mood?
Why is it that there is so much conflicting information? All countries it seems not just one or two?
I would say the "good science" has not been changing much at all.
So, scientists follow scientific method:
Scientific method - Wikipedia
The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century (with notable practitioners in previous centuries). It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation. It involves formulating hypotheses, via induction, based on such observations; experimental and measurement-based testing of deductions drawn from the hypotheses; and refinement (or elimination) of the hypotheses based on the experimental findings.
This process is not without some scientists doing a bad job (just like any other profession).
Note the bolded part above. This is one way we can occasionally end up with bad science making inaccurate claims. Typically, the good scientists are then going to come along to peer review their colleagues' work, realize the cognitive assumptions made by the bad scientists, and correct them.
Unfortunately, in this world of social media and news frenzy, by the time the good scientists have come back to say, "um, no. that makes no sense.", half the population has already heard about the bad science and has committed to it as something they believe (cause it's science!). And the media never seems as fascinated by the corrections as they do the extraordinary claims made by bad science. Bad science is more sensational and gets more clicks than good science I suppose.
And then of course there's other people out there just making stuff up without any scientific backing whatsoever.. They aren't even scientists, but I guess if they are "influencer" enough on social media, that also takes off.
My suggestion for trying to follow science news is to ignore the media, and go straight to the scientific organizations doing the studies. And even then, have patience until what is first published gets corroborated by other studies. Once it's got some corroboration, then we can start to think it's got some reasonable certainty to it.