Texas recently ordered a shipment of 22,600 doses of the H1N1 flu vaccine to be sent to a doctor in Dallas County. Another doctor got 14,036. Another got 6,780.

Who are these doctors? The state won't say. It's not clear whether these doctors work in small practices, large clinics or massive hospitals. Not even the Dallas County health department knows who is getting the big batches.

The state says it's helping doctors and patients by withholding any information about where vaccine is going. But Dallas County health director Zachary Thompson said Friday that the silence is creating at least as many troubles as it is avoiding.

"This process needs to be as transparent as possible," said Thompson, who said he had been fielding calls and e-mails from people who can't find a doctor with the vaccine.