7 Nasal Cavity
This too is not a surprise at all; the nose is the breeding ground for several types of bacteria. When you have a cold, its the nose trying to get rid of the bacteria. Also, if you scratch or finger your nose too much, chances of catching a nasal infection are highly increased.
8 Finger Nails
Fingernails carry a lot of germs, while dirt gets accumulated under the fingernails. This is extremely unhygienic since it can become a breeding ground for deadly bacteria and microbes.