Venezuela's doctors' union is warning of a possible resurgence of swine flu in the country and is reporting at least four new deaths this week.
Douglas Leon Natera is head of the Venezuelan Medical Federation. He accuses authorities of withholding information about how many have died from the virus.
The Health Ministry says there were 414 new cases between May 26 and June 1. That was a notable spike that raised the total on the year to 1,138.
Health Minister Isabel Iturria says there's no evidence of an outbreak that would require a special response. She says media reports saying otherwise are "totally erroneous."
But Natera criticized authorities Thursday for not being more forthcoming about fatal cases.
He also noted there has been no new information for nearly two weeks.