Yes, last time that I checked.
Strep, however, is likely a more serious infection and may also follow flu as pneumonia?
It's not necessarily more serious. They can both be deadly. How bad any microbial infection is subject to a number of variables, e.g. number of invading organisms, "route" of invasion, factors affecting virulence, host immune system, etc.
The pneumococcal vaccine will in most people protect against a strep form of pneumonia piggybacking a bout of flu?
Pneumovax 23 should cover those 23 subtypes of pneumococcus. Folks older than 65 should get it. They only have to get it once.
Thank you.