Causes of Warts. Skin warts are caused by a virus known as human papilloma virus (HPV). There are over 100 sub-types of this virus but only a few infect humans to cause warts on the skin. The virus enters the skin cells and replicated like all viruses do but does not extend beyond the skin.
With top speed full resolution shooting at between 4.5 and 6.5 fps (frames per second) these cameras are not going to be ideal sports shooters (that's where full frame DSLRs like the Nikon D4S and Canon 1D X come into their own).
A DSLR would be best for portraits, entry level models would be the Nikon D40 or Canon EOS-1000D...or perhaps the Pentax line. 85mm fixed lens is a good choice. You can get a compact like the Canon SX1 that has a decent zoom. Just depends on whether you are looking for pro results or casual snapshots/portraits. Some of my best ever candid portaits were with an Olympus C2100UZ, a 2MP 10X zoom camera.