Timeline image credits
Pre 20th Mosquito
1900s Cornea
eye sick cataract: iStock_07875512©Micheline Dubé
1910s Blood bag: iStockphoto 3739350/
1920s Needle
1930s Connected red drops
1940s Penicillin: Wellcome images / N0013876
1950s Thermometer: Wellcome Images / C0016130
1960s Heart trace
1970s Asthma inhaler: iStockphoto 3241516/RMAX
1980s Pregnant women: http://commons.wikimedia.org/wiki/File:Pregnancy_26_weeks_1.jpg
http://www.flickr.com/photos/inferis/74807157/
1990s Purple breast scan
2000s Monoclonal antibodies
2010s Blue helix
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