There are about 55 million students and 7 million staff members who attend 130,000 public and private school in the United States every day, and they are being affected by the flu season as well.
"The flu is still spreading just the same", she said.
The Centers for Disease Control says this flu season isn't as bad as some we've seen recently.but it doesn't mean we're in the clear.
Compared to last year's vaccine, it's also drastically more effective.
Influenza and flu shot data provided by Alberta Health Services show there were 1,966 cases of influenza A in Calgary, which is the flu strain that can spread from humans to animals.
Nationally, the percentage of clinic visits for flulike illness rose to 3.3%, up from 3.1% the week before, and all 10 of the CDC's regions are above their baselines for that indicator. During the influenza season, weekly flu updates are posted from October of the current year, through May of the following year.
On its weekly FluWatch website, PHAC said there were 20,494 laboratory-confirmed influenza cases reported by the provinces and territories as of January 12, a lot of them caused by H1N1 and most affecting those under age 65.
During the 2017/18 flu season, in which the dominant virus was a strain of H3N2, effectiveness was at a 17% low.
"But we have to remember that even after we've passed the peak, there are still several weeks of influenza activity even on the downslope of the curve". For adults, flu deaths are estimated based on pneumonia and other illnesses related to flu. People with flu may be able to infect others from one day before going sick to up to five to seven days after.
CDC recommends that people get a flu vaccine by the end of October, though there is still time to get vaccinated. "But give the vaccine credit for softening the blow". "This year, we had a really good match between what was in the vaccine and what was circulating". About half of those people have sought medical care for the illness, including more than 100,000 who were hospitalized.
More people have remained healthier and avoided infection from a flu virus in the 2018-19 influenza season thus far compared to the previous season - which ultimately resulted in more than 250 deaths and almost 1,900 hospitalizations by its end - according to the latest report from the Iowa Department of Public Health.