-
As you say there’s good evidence that vaccinating over 65s or people with risk factors (emphysema, cancer, heart disease) for pneumococcus as a one off, in addition to the yearly flu shot, reduces mortality. Bacterial pneumonia during/following flu is a big cause of death and the one common cause we can vaccinate against is pneumococcus.
Extrapolating that to COVID:
a) who knows if superinfection will be a big issue - although seems reasonable to assume it will be - the people with risk factors might not make it through the initial viral infection
b) are there any risks to receiving the vaccination potentially days-weeks before a COVID infection (altered immune response etc) - no idea
Just re-read my PubMed post above.
For Clarity:
I have not prescribed that particular vaccine so I am not au-fait with it.
Vaccines work.
Post-Viral Pneumonia (Secondary) is a real thing, that occurs regularly.
If the vaccine is NICE approved-and from @neu's post it seems that way for certain categories of patients- it probably is effective for those patients (and therefore in theory others).