As of Tuesday, the Wellington Dufferin Guelph Health Unit had vaccinated about 23,000 residents against the H1N1 virus without any serious side effects, an official said Wednesday.

The official admitted there had been some adverse reactions — such as persons fainting because they hadn't eaten, or because of the heat or stress of having a needle — "but nothing of the anaphylactic reaction that we would worry about."

The total numbers hadn't been broken down into age categories, although the health unit had been to the high schools and had encouraged parents to have their elementary school children vaccinated.

It was estimated, however, that 20-25 per cent of the secondary students had received their shots.

But that would be a difficult statistic to assess as some of the kids had gone to the regular clinics outside of school when those had been opened to the general public.

Prior to the inoculation program, there had been three deaths from all types of influenza within the health unit's area.

The official knew of none since the start of the program, and certainly not within the past week, she said.

Whether there had been hospital admissions recently could not be immediately determined.