Since starting daycare in March, Lydia Ip’s two-year-old daughter has been diagnosed with (RSV) at least four times, she said.

Her daughter’s most recent infection on Oct. 17 led her to spend several days at Cortellucci Vaughan Hospital in Vaughan, Ont. RSV, a common childhood infection, affects the lungs and respiratory tract, usually resulting in cold-like symptoms such as a runny nose, coughing and fever.

But the virus can cause other infections as well, such as pneumonia. This was the case for Ip’s daughter, who also suffered from an ear infection and saw her oxygen saturation level drop to 80 per cent.

“RSV actually made her more sick than COVID,” Ip told CTVNews.ca in a telephone interview on Tuesday, referring to her daughter’s COVID-19 infection in April. “With RSV, her cough was much more severe to the point that she threw up … COVID didn't bother her as much.”

Ip is one of several Canadians who reached out to CTVNews.ca to share their children’s recent experience with RSV. The emailed responses have not all been independently verified.

Cases of RSV are on the rise in Canada. According to the Public Health Agency of Canada’s latest Respiratory Virus Report, there has been a steady increase in positive RSV tests across the country since early September, particularly in Quebec.

"Respiratory syncytial virus activity (486 detections; 3.5% positive) is above expected levels for this time of year," . Similar to the flu, RSV outbreaks tend to occur in seasonal waves that run from fall to late spring.

This comes at a time when emergency rooms across Canada are already struggling with and staff shortages. Ip said she witnessed this first-hand when she took her daughter to the hospital for a previous RSV infection last month. A lack of available pediatric beds meant her daughter would have to wait nearly 20 hours for a bed, Ip said. In the United States, a is also overwhelming pediatric hospitals in Connecticut and Illinois.

According to PHAC, there is no . This leaves parents such as Ip worried about what subsequent infections could look like for their children.

“There isn't much we could do, but prepare for the onset of [the] next [infection],” Ip wrote in an email to CTVNews.ca on Oct. 24. “It is such a stressful time as a parent, especially when you are so nervous not knowing when the next one will hit and how bad it will be.”

‘YOU REALLY HAVE TO JUST RIDE IT OUT’

Rebecca St. John, based in Calgary, said RSV has hit her youngest of three children particularly hard. Her 18-month-old daughter is not only coughing, but experiencing fevers that last several days at a time, she said. On Oct. 21, St. John’s daughter was diagnosed with RSV by their family doctor and given antibiotics for her cough.

“It’s very concerning,” she told 鶹ý Toronto on Monday. “Ever since people have [started] taking their masks off [and] COVID restrictions have lifted, it’s so much worse than it was before – the cough is worse, the runny nose is worse, the congestion is so much worse.”

Her two-year-old son is also infected with RSV, St. John said, coughing to the point of throwing up. St. John said she has never seen either of her children this sick before.

The rise in RSV cases this year is being attributed to the implementation of fewer public health restrictions designed to curb the spread of COVID-19. From , PHAC recorded 239 confirmed cases of RSV. This was during the time when provinces and territories across Canada had imposed lockdowns, as well as mask wearing and physical distancing measures. During the , there were .

According to experts, the lack of exposure to viruses over the last two years has made young children more vulnerable to infection.

"I think their immune system just hasn’t seen the number of viruses a typical child prior to the pandemic would have seen," Dr. Thomas Murray, a Yale School of Medicine pediatric infectious disease specialist, told CNN.

Severe cases of RSV , PHAC says, where children who are struggling to breathe may be given oxygen. But many infections end up being simple colds and usually clear up on their own after a week or two, according to the (CDC).

So far, St. John said she has not had to take either of her children to the hospital, but she continues to use humidifiers and give them Tylenol to help clear their congestion.

“It’s really about keeping them comfortable [and] making sure they’re drinking their fluids,” St. John said. “Other than that, you really have to just ride it out.”

TREATMENT AND PREVENTION

For Monica Kapac, her son’s RSV infection came as a shock, she said.

“I knew RSV was going around, but … I just kind of figured we were probably through the worst of it,” she told CTVNews.ca in a phone interview on Tuesday.

What started as a simple cold turned into a high fever, Kapac said, along with shortness of breath, wheezing, vomiting and a cough. After taking him to Okotoks Health and Wellness Centre on Oct. 20, her 11-month-old son was diagnosed with RSV. From there, he was transferred to Alberta Children’s Hospital in Calgary. A few days later, her son was discharged from the hospital and his condition has since improved, she said.

According to the CDC, the best way to relieve symptoms associated with RSV infections is by taking over-the-counter pain and fever medications, such as acetaminophen or ibuprofen, and . For now, Kapac gives her son Tylenol or Advil to manage his fever, and keeps him hydrated with plenty of liquids, she said.

Her biggest advice for parents is to trust their instincts if their children are sick, and not shy away from getting them the help they need.

“Trust your gut – if something seems a little off or you're worried about something, it’s definitely better to get it looked at,” Kapac said. “If we hadn’t taken him in, then who knows what could have happened.”

Dr. Donald Vinh, an infectious disease specialist at McGill University in Montreal, said RSV is quite contagious, similar to COVID-19 and other respiratory viruses.

"We are seeing a return to what it was before the pandemic with these respiratory viruses, except it's not just those respiratory viruses from prior to the pandemic — added to the mix now is also COVID," Vinh told CTVNews.ca on Monday.

While the virus is common among children, it can also be contracted by adults. Deanna Kirkbride said she now has RSV after her four-year-old son became infected with the virus earlier this month. Kirkbride took her son to the Englehart and District Hospital after his fever spiked to 104 F, where he was diagnosed with RSV on Oct. 20. In addition to fever, he also has a double ear infection and a cough.

Kirkbride said she has a slight fever herself, as well as shortness of breath and fatigue.

“When something like this hits, it hit hard,” Kirkbride told CTVNews.ca in a telephone interview on Tuesday. “I've missed out on work for almost two weeks now.”

Her son’s condition has since improved, Kirkbride said. She continues to give him Tylenol and Advil to manage his fever, and he takes antibiotics for his ear infections.

One thing Kirkbride said she hopes to see going forward is more awareness around the virus and how to handle symptoms.

“When I posted online that I had RSV … my friends and family had no clue what it was,” Kirkbride said. “Public health should be giving out more information and being more open about [RSV].

“They're very open about COVID [but] there's other stuff out there that can be just as bad.”

With files from CTV National News Los Angeles Bureau Chief Tom Walters, CTV National News Correspondent Heather Wright, and CTVNews.ca Writers Michael Lee and Daniel Otis