> It might turn out like if we treated the cold, COVID, tuberculosis and lung cancer as the same thing because they all involve coughing.
Well there are 200 different viruses that cause the common cold. We lump them together because they all involve coughing.
Basically all cancers are unique, even for the same type of cancer. Again, these are lumped due to shared symptoms.
Tuberculosis is caused by 9 different species of bacteria, but these are at least related species.
Covid is basically exactly the same disease as SARS, just caused by a particular strain of coronavirus, though that strain divereged into multiple ones that now produce quite different symptoms. In addition to SARS, other coronaviruses are among those 200 that cause the common cold.
Diseases are historical groupings that someone at some point thought would be useful, nothing more.
Well there are 200 different viruses that cause the common cold. We lump them together because they all involve coughing.
Basically all cancers are unique, even for the same type of cancer. Again, these are lumped due to shared symptoms.
Tuberculosis is caused by 9 different species of bacteria, but these are at least related species.
Covid is basically exactly the same disease as SARS, just caused by a particular strain of coronavirus, though that strain divereged into multiple ones that now produce quite different symptoms. In addition to SARS, other coronaviruses are among those 200 that cause the common cold.
Diseases are historical groupings that someone at some point thought would be useful, nothing more.