Most all news is affected by money and sponsorship. So much like your weight loss product example, even the most seemingly dry and unbiased news source can often be affected by outside influences. Thus circumspect to suspicion.

When you collect good data on vaccines, the math shows nearly definite efficacy.

Now show us the independent 3rd party analysis of the data, not those who make this determination with a conflict of interest.$$$

Then the polio vaccine came out. Now, polio is almost eradicated. I know the polio vaccine had problems, but polio really was worse.

Just like Pharma says about Autism. Correlation is not causation!