I knew you were gonna bring that up. I waited to see if you were gonna fall for that trap because it's an indication of how informed are you in this subject.
seriously dude.... 1918? 8 studies? medical science wasn't exactly reliable back then. the medical community and government were largely clueless about this subject back then. and plus - nobody was able to explain why the Spanish Influenza pandemic declined. Are you saying convalescent serum was the reason why the pandemic had finally came to end?
the post result of this pandemic was the beginning of understanding how it works, medical theories on viruses/germs, and better antiseptic practice.... and the worst part... the advancement of biological warfare development.
that's it? why so few....
there you go. I'm sorry but this convalescent serum for Ebola is unproven, unreliable, and dangerous. only 3 people? not exactly quite proven.
and why no convalescent serum "cure" for HIV/AIDS? or Bird Flu? SARS? Congo Fever?
As I said, there are others but I didn't want to bore you with them, I'm sure you are capable of looking them up. The Argentine study should be enough to show even to you that it works; when a death rate goes from basically 50% down to 4% after the convalescent serum was used is pretty overwhelming. As for HIV and AIDS no one has been cured of it as of yet, so where exactly are they to get the serum?