http://www.flickr.com/photos/28634332@N05/5984807021/

Pathogen

http://www.flickr.com/photos/ajc1/1257163357

Virus

http://www.flickr.com/photos/ajc1/510676658

Bacteria

http://www.flickr.com/photos/jsrcyclist/3181389420

Medicine

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

Flagella

http://www.flickr.com/photos/cambodiatrust/2780347159

POLIO

http://www.flickr.com/photos/ringai/3975402556

Antigen

http://www.flickr.com/photos/andresrueda/2983149263

Vaccine

http://www.flickr.com/photos/themaxsons/2849159830

Chicken Pox

http://www.flickr.com/photos/blkjesus01/516325010

Small Pox