UTAH, Feb. 22, 2021 (Gephardt Daily) — Intermountain Healthcare officials said Monday pediatric RSV and flu cases have plummeted this winter.
“This year, Primary Children’s Hospital has had no pediatric RSV or flu patients admitted to the hospital, which is unheard of,” said a news release from Intermountain Healthcare. “Influenza infections, which can be severe in young children, are also extremely rare this year.”
The safety measures that people are taking during the COVID-19 pandemic can explain some, but not all, of the anomaly, said Dr. Andrew Pavia, chief of pediatric infectious disease at University of Utah Health and director of epidemiology at Intermountain Primary Children’s Hospital.
“Masking, handwashing and physical distancing clearly played a major role, but it is hard to understand why RSV just did not show up at all this year,” Dr. Pavia said. “It’s a silver lining of the pandemic, but also bit of a mystery.”
RSV is a seasonal respiratory illness that causes infection in the lungs and breathing passages. It is often more serious for babies and young children, especially if it causes bronchiolitis or another complication, said Dr. Per Gesteland, a pediatric hospitalist at University of Utah Health and Intermountain Primary Children’s Hospital.
“In Utah, RSV is most active in the winter and early spring, and epidemics are reported every year between January and March,” said Gesteland, who oversees GermWatch, a tool created by Intermountain Healthcare and University of Utah Health to help the public understand Utah communicable disease trends, symptoms and general information about treatment.
“We’ve never had a year with so few cases of RSV or influenza,” Gesteland added.
It is not unusual to diagnose well over 100 cases of RSV and influenza per week for several weeks each winter; some winters are even more severe, the news release said.
Typically, about 80 children are admitted to Primary Children’s Hospital each week during the January and February peak of respiratory viral season, with up to one-third of those patients requiring ICU care, Gesteland said.
In the 2018-2019 flu season, about 300 children were hospitalized due to complications with flu, Gesteland added.
“Primary Children’s caregivers had been concerned that a winter RSV and flu surge on top of COVID-19 cases could stretch hospital resources to the brink,” the news release said. “Instead, there have been enough resources to treat children with COVID-19 and its related serious complication, Multi-System Inflammatory Syndrome in Children (MIS-C).”
Measures like masking and reducing social interactions for infants are probably even more effective for RSV, because it is not as transmissible as COVID-19. Perhaps the COVID-19 dominance of the viral ecosystem has an additional impact on displacing RSV in ways we do not fully understand, Pavia said.
“One thing seems to be clear from the experience of the winter of 2020-21: We can decrease the impact of influenza on infants and children with better handwashing, mask use, and limiting the amount of their exposure to others,” Pavia said. “Whether and how we will change our winter behavior enough in the future to reduce the impact of RSV and flu in the future is yet another mystery.”