No experience with pneumonia, but my husband got sick on a Fri. in the AM, I made an appt. with the Doctor for the early afternoon because I didn't want him sick all weekend, at the Doctors office I came down with the same symptoms my Husband had earlier in the morning, saw the Doctor, got a prescription because we both had bronchitis and we had the flu, got the prescription filled, we went to bed about 3 and were bed bound for a week, it was insane, it took us about a month to recover. I couldn't believe how fast the symptoms came on.