In contrast, H1N1 tends to target children and younger adults more than seniors - and flu-trackers like Skowronski say this season is no exception. Eighty-five per cent of children admitted to intensive care because of the flu are under the age of 10, according to the Public Health Agency of Canada.
This year's flu season began in late October and is expected to last through March.
Moore said physicians at CHEO are seeing cases of RSV (respiratory syncytial virus) and other viruses as well as some flu.
Since December 1 last, there have been 39 confirmed cases in the Mid-West, and 26 of these detections were resident in Limerick. Rates, however, were higher among young children and the elderly (14.5 and 11.9 hospitalizations per 100,000 people, respectively), as these populations are more susceptible to complications of the flu.
The 2017/2018 influenza season was considered one of high severity by the Centers for Disease Control and Prevention (CDC), with high rates of emergency department visits and widespread flu activity over an extended period.
"So we're probably on track to coming up to more of our peak activity in the next couple of weeks or so". There have been three flu-related deaths this season, the victims were 63, 75 and 91 years old. Vaccines protect against multiple flu strains.
The HSE has urged all people in at-risk groups for the flu to get vaccinated if they have not done so already.
Other tests called rapid molecular assays can also take 15 to 20 minutes to complete and they detect the actual genetic material of the flu virus, according to the CDC.
The doctor said only 35 per cent of children aged six months to 23 months have been immunized.
Experts say it takes about two weeks to build up immunity against the virus after getting vaccinated. A previous version misstated the age of children affected by the flu in a quote from Dr. Danuta Skowronski.