Is RSV More Dangerous Than Flu? Seniors More Likely to End Up in the ICU and Have Heart Complications

Respiratory syncytial virus (RSV) infection may increase the risk of serious cardiovascular complications in older adults, according to a study conducted by Canadian researchers. Among hospitalized patients over 65 years of age, RSV infection was more likely to lead to heart failure, arrhythmia, and death than influenza. Experts remind the elderly of the importance of vaccinations.

For years, the respiratory syncytial virus (RSV) was primarily associated with infections in young children, especially newborns and premature infants. Meanwhile, evidence is growing that the virus also poses a serious threat to older adults, especially those over 60. Weakened immunity and chronic illnesses make seniors less susceptible to infections and more likely to experience complications.

Typical symptoms of RSV infection—runny nose, fever, cough, headache, and sore throat—are easily confused with the flu or COVID-19. However, in older adults, the virus can cause more severe conditions, such as pneumonia or heart failure.

A team of researchers from the University of Toronto, led by Dr. Jeffrey C. Kwong, analyzed data from 104,095 patients aged 65 and over hospitalized between 2011 and 2020. They compared the risk of complications among those treated for RSV, influenza, urinary tract infections, and fractures.

The results were clear: seniors infected with RSV were more likely to develop heart failure, both in those with and without pre-existing heart problems . There were also more cases of atrial fibrillation, especially in patients with pre-existing heart disease.

Furthermore, people with RSV were more likely to require intensive care unit stay and had a higher mortality rate within 30 days of hospitalization.

RSV infection affects more than just the respiratory system. Data show that it can significantly increase the risk of heart attack, stroke, and heart failure —conditions that have particularly serious health consequences for seniors.

In Poland, as of April 1, people aged 65 and over can get vaccinated against RSV free of charge . For those aged 60–64, the vaccine is available at a 50% discount. Pregnant women are also covered, allowing newborns to be protected from infection from the first days of life.

The virus is transmitted through droplets and is highly contagious. Therefore, experts urge older adults not to ignore the symptoms of respiratory infections and to utilize available preventative measures.