Orthopneumovirus hominis (commonly called human orthopneumovirus, and RSV before that) kills nearly half as many people as flu and more than Betainfluenzavirus influenzae (commonly called flu B). It's significant enough to warrant universal recommendation to every person 6 months and over.
It says here in 1975 it was originally called respiratory syncytial virus (RSV).
https://ictv.global/taxonomy/taxondetails?taxnode_id=202501651&taxon_name=Orthopneumovirus%20hominis
Before 2023 when the vaccine came out, no one gave a hoot about it. In 2024 CDC made a model based on its flu deaths model since 2010 and came up with 11,000 deaths that season. This season is a bit less with 9,600 deaths up until now so probably about 10,000 for the season.
https://www.cdc.gov/rsv/php/surveillance/burden-estimates.html
Also, in the NREVSS dashboard, Orthopneumovirus hominis is significant, topping the 5% threshold which excludes it from being a common cold virus according to my definition of common cold virus.
https://www.cdc.gov/nrevss/php/dashboard/index.html
It wasn't until this year FDA approved Orthopneumovirus hominis vaccine for younger adults at higher risk.