Golf balls are indeed a choking hazard if you're trying to swallow it.

Golf balls are damn near impossible to fit in your mouth let alone swallow it. You'd have to go out of your way to abuse it for it to become dangerous.

Vaccines are a health hazard if you're intent on injecting it.

Citations needed

Do you trust sites that post articles sponsored by pharmaceutical companies?

No, I don't. I don't bother reading articles by themselves anyways, I dig for the source links so I can read whatever data the article is based on. I don't trust stories with no sources either.

Which, by the way, are most vaccine articles printed in the media.

Most? By who's count and on what sites?

Edit: fixed a typo, clarified my statement