RSV
1 of 2abbreviation or noun
plural RSVs
: respiratory syncytial virus
Like many viruses, RSV is spread through contact with an infected person or contaminated objects.—
Nancy Snyderman
Nancy SnydermanRSV, a common respiratory illness that can cause severe breathing problems for babies, has been spreading around the region and the country, and doctors are cautioning about the risks to young children.—Josette Keelor
Josette KeelorRSVs typically emerge in late fall and remain until early spring. However, signs of RSV outbreak began in the middle of April before exponentially increasing by early May.—Winston Henvey
Winston HenveyExamples of RSV in a Sentence
Recent Examples on the Web
Matthew Perrone, Fortune, 16 May 2026
Shots against seasonal flu, RSV, tetanus, diphtheria, and pertussis (Tdap), pneumococcal infections, hepatitis A and B, and typhoid have all been linked to lower risks.
—Beth Mole, ArsTechnica, 15 May 2026
As early as June of last year, Reuters reported, Høeg brought up safety questions about treatments for respiratory syncytial virus (RSV) in infants that had already been FDA-approved.
—Aria Bendix, NBC news, 15 May 2026
Moderna, founded 2010, reported that the company has returned to profit in a May financial update as four of its products are now commercially approved, including its two different COVID vaccines, its COVID plus flu combination vaccine, and its RSV vaccine.
—Charlotte Hu, Time, 12 May 2026
See All Example Sentences for RSV
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Abbreviation or noun
Since arriving at the FDA last March, Hoeg led investigations into the safety of injectable RSV drugs for children, antidepressants and COVID-19 vaccinations.
—Matthew Perrone, Fortune, 16 May 2026
Shots against seasonal flu, RSV, tetanus, diphtheria, and pertussis (Tdap), pneumococcal infections, hepatitis A and B, and typhoid have all been linked to lower risks.
—Beth Mole, ArsTechnica, 15 May 2026
As early as June of last year, Reuters reported, Høeg brought up safety questions about treatments for respiratory syncytial virus (RSV) in infants that had already been FDA-approved.
—Aria Bendix, NBC news, 15 May 2026
Moderna, founded 2010, reported that the company has returned to profit in a May financial update as four of its products are now commercially approved, including its two different COVID vaccines, its COVID plus flu combination vaccine, and its RSV vaccine.
—Charlotte Hu, Time, 12 May 2026
See All Example Sentences for RSV
Cite this Entry
“RSV.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/RSV. Accessed 31 May. 2026.
Copy CitationMedical Definition
RSV
1 of 2 abbreviation or noun
: respiratory syncytial virus
Long considered primarily a pathogen of young children, respiratory syncytial virus (RSV) has been recognized as a cause of upper and lower respiratory tract infections in adults.—Harvey B. Simon, Science & Medicine
Harvey B. Simon, Science & MedicineHowever, upper respiratory tract infections caused by RSV tend to last longer than those caused by other common respiratory agents …—Caroline Breese, The New England Journal of Medicine
Caroline Breese, The New England Journal of MedicineRSV
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