Flu-shot woes may cause delay — but not shortage

A day after a leading flu vaccine maker warned that it would hold up millions of doses because several batches were contaminated, U.S. health officials said Friday they do not expect a flu shot shortage.

Only about 4 million doses appear to be tainted — not enough to have a big impact on this year's supply although there may be a delay in making some shots available, the officials said.

"This is not a crisis," said Dr. Julie Gerberding, director of the federal Centers for Disease Control and Prevention.

"We'll end up having more vaccine doses than we've ever had before. Ultimately, all people who need flu vaccine should be able to get their shots," she predicted.

On Thursday, Chiron Corp., which supply's half the nation's flu vaccine, said factory tests had revealed that some batches were tainted and that all 50 million doses that the company was producing would be held up for additional tests to ensure safety.

"We are confident that we've identified the root cause," said John Vavricka, Chiron's vice president of commercial operations for North America. He refused to say what the contaminant was.

He said that all but 4 million doses had proven pure in testing but 50 million doses will be retested, causing a delay.

Chiron still plans to ship 46 million to 48 million doses by early October, about a month later than usual, plus 2 million more for the federal government's emergency stockpile, he said.

The stockpile is new this year and will contain 4.5 million doses, Gerberding said.

Meanwhile, the nation's other big producer, Aventis Pasteur, reported that federal officials had asked it to make additional vaccine to cover any shortfalls. But the company is already at capacity and can't produce more until after November when existing orders are filled.

Aventis expects to ship 52 million doses — 9 million more than last year.

Flu shot campaigns usually start in October, a month before the flu season typically begins in the United States. In an average year, flu kills 36,000 people and hospitalizes another 114,000, mostly the elderly.

Last year, the season started early, producing record demand for vaccine and temporary shortages. In the end, some vaccine was leftover, and the season was no worse than usual. The previous two years saw vaccine shortages for different reasons.