“I wonder, do survivors of Ebola acquire immunity?”
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As I understand it yes they do...at least for the “strain” of Ebola (and possibly closely related strains) with which they were infected.
If survivors acquire immunity then maybe there’s a chance for inoculation the way it was done in the old days for smallpox. Dab clear pus from a recovering victims’ wound and insert it into a cut in the arm. The dead virus was in the pus and the uninfected person’s body would develop anti-bodies from the dead virus.