In elderly individuals, pneumonia leading to hospitalization is most commonly caused by viruses, particularly rhinovirus.

“there was a paper that came out from the cdc in new england journal in 2015 that looked at what actually causes pneumonia and the elderly that gets them hospitalized and it's not a combination of virus and bacteria that is some of it but the majority is a virus and the most common virus is actually rhinovirus which is the cause of the comic cold and it's that the elderly just can't handle viruses the same way as younger people do so they can actually die from the flu just make sure that's what you're saying they don't have to get bacterial super infection no even with rhinovirus”