Exact(58)
Scientists, however, have not yet proved Zika causes either condition.
Investors could be skittish about plans like these, simply because they are not yet proved.
They are experimenting with a variety of advertising formats, though none has yet proved very successful.
None of Sony's decisions to go it alone has yet proved foolhardy.
A wide range of subsidies for electric vehicles has not yet proved adequate to offset this.
Some materials have been proposed for this, but none has yet proved ideal.
Self-regulation hasn't yet proved to be sufficient," said head of consumer policy, Sue Edwards.
The London Olympics were known as the "austerity games", and yet proved a triumph of resourcefulness.
No Bucharest dog has yet proved rabid, but some people take precautions.
Skeptics questioned spending to "double down" on programs that have not yet proved effective.
"Businesses have moved into Orestad, but the plan has not yet proved hugely successful in attracting new residents," says Nick.
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