http://www.flickr.com/photos/12739382@N04/3606399643/

Virus

http://www.flickr.com/photos/darrowassoc/3914916754

Bacteria

http://www.flickr.com/photos/microbeworld/5859867951

Flagella

http://www.flickr.com/photos/niaid/5950870236

T cell

http://www.flickr.com/photos/kathycsus/2026440476

cell

DIsease

http://www.flickr.com/photos/chimairaflickr/3248066179

Imfection

http://www.flickr.com/photos/97867906@N00/4772117172

Medicine

http://www.flickr.com/photos/flahertyb/3693540425

Vaccine

http://www.flickr.com/photos/52431880@N03/4865345714

Polio

pathogen

http://www.flickr.com/photos/thejcb/5136606417