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In the 'History' section, one of the last sentences has a reference, but in that reference there are several links, one of which is a dead link. It is reference  in "...decline in cases shortly thereafter. Vaccination against..." The dead link is the reference to a page via "http://dx.doi.org/10.1001%2Fjama.269.2.221" but that site cannot find that page. --Observer6 (talk) 16:03, 13 June 2013 (UTC)
Fixed. Thanks for pointing that out. JFW | T@lk 12:25, 16 June 2013 (UTC)
The article describes the causes, symptoms, treatment, diagnosis, statistics, and history of pneumonia, but seems to fail to define what pneumonia actually is (other than vaguely saying it is some inflammatory condition that affects alveoli). I suggest that the lead section of the article should include a definition. —BarrelProof (talk) 01:17, 9 July 2013 (UTC)
The first sentence is an accurate description - pneumonia is a very big topic: causes include noninfectious and infectious (bacterial, viral, fungal, etc); presentation can be acute/abrupt or insidious/chronic presentations; severity can range from almost imperceptible to lethal; etc. What they share is inflammation of the lung tissue. A good analogy is storm - there's a temptation to be more specific, but it's such a big topic that it must be general to be accurate. -- Scray (talk) 02:05, 9 July 2013 (UTC)
I'm not looking for causes, presentation, severity, or analogy. I'm looking for a clear definition. My understanding is that the definition is something like "inflammation of the lungs with consolidation" or "inflammation of one or both lungs, such that a substantial number of the air sacs (alveoli) become filled with liquid, thus rendering them ineffective for breathing". How are those? The current lead section says that it is an inflammatory condition that primarily affects the alveoli, but it does not say whether or not there are other inflammatory conditions that affect the alveoli that are not pneumonia. The current opening sentence is kind of like saying that a cat is a mammal, or that an automobile is a vehicle with wheels – these are true statements, but woefully incomplete. In my opinion, we can't properly talk about the topic until we establish what the topic is that we're talking about. —BarrelProof (talk) 02:57, 9 July 2013 (UTC)
Consolidation is not required. Viral pneumonia usually presents without consolidation. Do you have any refs with better definitions? Doc James (talk · contribs · email) (if I write on your page reply on mine) 03:38, 9 July 2013 (UTC)
The term is also sometimes used more broadly in terms like Idiopathic interstitial pneumonia. While some people use it for just infection not everyone does. Anyway I spent hours trying to figure out the definition. The reason why the definition here is so vague is because while the definition is vague and convoluted in the literature. Doc James (talk · contribs · email) (if I write on your page reply on mine) 03:51, 9 July 2013 (UTC)
If there is no clear well-established definition of pneumonia, can we simply say that in the article? Otherwise, the reader is stuck fruitlessly searching and wondering why the article is so poorly written as to neglect to define what it is discussing. I do not have a better definition – actually, I came here to try to learn exactly what pneumonia is, and was frustrated in that effort. —BarrelProof (talk) 04:04, 9 July 2013 (UTC)
Or could it be, perhaps, that any inflammatory condition that affects the alveoli is considered pneumonia? —BarrelProof (talk) 04:15, 9 July 2013 (UTC)
That's true, but it is too narrow to be used as a definition. Our article describes pneumonia well, I think the problem could be that you expected something that is not found in reliable sources. -- Scray (talk) 11:26, 9 July 2013 (UTC)
I have no idea what this term means and it is the heading of an entire section.
Is this page for the benefit of the medical community, or a normal person like me trying to find out more about the condition that has afflicted my niece?
I suggest it is replaced with something simpler and more meaningful to non medicals. If this is too difficult (sigh...) at the very least it needs to be linked to a definition. — Preceding unsigned comment added by 18.104.22.168 (talk) 15:23, 23 September 2013 (UTC)
A cursory read of the section will reveal that it discusses the mechanism behind the illness. You can also Google the word for the background. The word is sometimes used in medical articles, although WP:MEDMOS suggests the title "Mechanism" can be used as well. JFW | T@lk 21:31, 23 September 2013 (UTC)
Good point. Maybe we should use mechanisms preferentially? Doc James (talk · contribs · email) (if I write on your page reply on mine) 08:55, 24 September 2013 (UTC)
Looking at reference 15: Ebby, Orin (Dec 2005). "Community-Acquired Pneumonia: From Common Pathogens To Emerging Resistance". Emergency Medicine Practice 7 (12). and following the link to the original article, it would appear the authors name is Orin Eddy, not Ebby as litstd — Preceding unsigned comment added by Darksabath94 (talk • contribs) 02:23, 5 October 2013 (UTC)
✓ Done Thanks, well spotted. JFW | T@lk 15:00, 6 October 2013 (UTC)
The image File:Lobar pneumonia illustrated.jpg is a high-quality illustration from the National Institutes of Health that explains lobar pneumonia. I would be glad if there was some way to incorporate it into the design of the article (which seems to be very well thought through). CFCF (talk) 20:21, 12 November 2013 (UTC)
We already have  which is more or less the same. Doc James (talk · contribs · email) (if I write on your page reply on mine) 00:07, 13 November 2013 (UTC)