Source?

I'll answer your question in a more general way because I don't believe this is specific to vaccines (and I don't have data on conflicts of interest specific to vaccine research).

Here's some light reading material on the current state of conflicts of interest in science:

• Are commercial conflicts of interests justifiable in medical journals?

• "The case against science is straightforward: much of the scientific literature, perhaps half, may simply be untrue. Afflicted by studies with small sample sizes, tiny effects, invalid exploratory analyses, and flagrant conflicts of interest, together with an obsession for pursuing fashionable trends of dubious importance, science has taken a turn towards darkness." - Richard Norton, Editor in Chief of The Lancet.

• The BMJ is the first general medical journal to require data sharing for all trials, extending its initial policy on sharing data for trials of drugs or devices, which took effect in January 2013, says Elizabeth Loder, The BMJ's acting head of research. In an editorial to mark the launch of the new policy, she explains that the initial policy focused on trials of drug and devices "because many high profile, serious allegations of selective or non-reporting of trial results related to such products." However, she says, growing experience and evidence show that reporting problems are not limited to the corporate sector, but affect academic and government sponsored trials as well.

• Prolific authors raise concerns about industry dominance in diabetes research