Unfortunately that is not relevant to this flu. Additionally we have MRSA now which is not easily treated with antibiotics.
Even good old Staph Aureus can be a difficult bug, and anything systemic is high risk.
Treating sepsis is just not as simple as using IV bug juice.
I think the original poster wanted to know why antibiotics would be used on people with the flu. One poster mentioned pneumonia and I mentioned the article I read about secondary staph infections during the 1918 epidemic. I contracted a staph infection in a hospital in my teens and I know how hard it can be to fight. I hope I didn’t come across as trying to imply that treating something is as easy as giving someone a shot.