A 72-year-old woman did not get a "flu" shot in the fall as recommended for older persons. In the wintertime, she became ill, as many people in her community did, with a respiratory illness that lasted for 3 weeks. During this illness, she had a fever with a non-productive cough, mild chest pain, myalgias, and headache. What was her chest radiograph most likely to have shown during this illness?
Bilateral interstitial infiltrates