http://www.flickr.com/photos/winnie_quan/3475140016/

Quarantine

http://www.flickr.com/photos/sanofi-pasteur/5279806085/sizes/z/in/photostream/

Bacteria

http://www.flickr.com/photos/joeflintham/4823988697/sizes/z/in/photostream/

Vaccine

http://www.flickr.com/photos/grumpy-puddin/5161814652/

Medicine

http://www.flickr.com/photos/microbeworld/5640222273/

Virus

http://www.flickr.com/photos/sj_sanders/4090241252/

Doctor

http://www.flickr.com/photos/gyuvallos/169034076/

Vector

Contagious

http://www.flickr.com/photos/tummysak/5716692/

Cell

http://www.flickr.com/photos/wellcomeimages/5814247239/

http://www.flickr.com/photos/hundreds/69008977/

AIDs