animalexperimentation animals besmetting communicablediseases ebolavirus ebolavirusdisease epidemias epidemiology krankheit largetypebooks marburgvirusdisease molecularvirology monkeydiseases newyorktimesbestseller nyt:health=2014-10-12 popularworks primatesaslaboratoryanimals primatescomoanimalesdelaboratorio verbreitung virusdiseases