"I would like to see it go so we have definitive data."

He added, however, that "it was too early to have definitive data, because the drug was just released this January."

"We have the definitive data to show industry that the problems go back to the fields and processing plants."

The new study was small and not meant to give definitive data on the vaccine's effectiveness.

At the moment, there is no definitive data on this subject, nothing that tells us if male development has accelerated, too.

For many years definitive data on Israeli emigration was unavailable.

But he said that definitive data do not exist.

So researchers are seeking optimal study design and definitive data.

But, he said, many patients feel they are in a desperate situation and cannot afford to wait until more definitive data come in.

Experts say the vaccine seems reasonably safe but definitive data on this point too are lacking.