Still in the hospital. My temperature seems to have stabilized near normal, I'm coughing a little less, and blood oxygen (without supplemental oxygen) is up in the 94% range. However, pulse rate and respiration rate are unchanged and much higher than normal, so the jury is still out.
For the medically inclined: I was started on a Z-Pak (azithromycin) Monday, then in the hospital they added a cephalosporin IV antibiotic Tuesday. By today (Thursday) we didn't see much progress, so the hospital doctor finally talked me into oral Levaquin, dropping both of the others. That dose was this noon , so it's had only about nine hours to take effect, and obviously I don't know which antibiotic regimen might be working, if indeed anything really is working.
I'm nervous about Levaquin, because it's one of the drugs that can cause the Achilles tendon to rupture. If that happens my running will be dramatically curtailed (zero). However I finally agreed to Levaquin because I didn't see progress on the other meds, and I can live without running but I can't run without living.
As always, I'll know more in the morning. I'm still alive and there is a little more light at the end of the tunnel.