File talk:Spread of Disease.JPG
What does this represent? What are the axes on this graph? I think this needs clarification. --184.175.54.58 (talk) 03:14, 28 January 2012 (UTC)
What does this represent? What are the axes on this graph? I think this needs clarification. --184.175.54.58 (talk) 03:14, 28 January 2012 (UTC)[reply]
