> For instance, viruses can cause pneumonia directly. But in some cases, if a viral respiratory infection is severe enough, it can damage the lungs and leave them vulnerable to a secondary infection: bacterial pneumonia. This is common with flu, though scientists aren’t exactly sure how often it occurs.
IIRC, that's not incompatible with having a COVID-19 infection.
https://www.consumerreports.org/coronavirus/understanding-pn... (first google link I found):
https://www.consumerreports.org/coronavirus/understanding-pn...
> For instance, viruses can cause pneumonia directly. But in some cases, if a viral respiratory infection is severe enough, it can damage the lungs and leave them vulnerable to a secondary infection: bacterial pneumonia. This is common with flu, though scientists aren’t exactly sure how often it occurs.