And if you only use raw disease incidence[0] as your prior, you're approximately just as likely (-ish?) to have pulmonary embolism. This obviously does not include other very important priors, like age, exact symptom list or incidence of SARS-CoV-2 in your area right now.

[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3718593/