Networks of innovation

["Drug Industry" "History" "History 20th Century" "Merck Sharp & Dohme International" "Vaccines" "Vaccines industry" "History of medicine" "Pharmacology" "20th century" "Medical" "Pharmaceutical Research" "Business / Economics / Finance" "Business/Economics" "Corporate & Business History - General" "United States - 20th Century" "History / United States / 20th Century" "Merck Sharp and Dohme - Firm - History" "Immunology" "Arzneimittelentwicklung" "Impfstoff" "Farmaceutische industrie" "Vaccins" "Vernieuwing" "Samenwerking" "Bact\u00e9riologie" "Histoire" "Geschichte 1895-1995" "Merck et Co" "Merck & Co"]