Molluscum contagiousum is highly contagious and easily spread through skin-to-skin contact with someone who is infected or by touching contaminated objects such as a flannel or towel.

BBC: Women in bikinis

Norovirus can be spread through contact with contaminated surfaces or objects, by contact with an infected person, or by the consumption of contaminated food or water.

BBC: Winter vomiting cases at 1.1 million

Shots of seemingly innocent objects a bus pole, an empty glass, both recently touched by an infected person are held for just an instant longer than usual.

NEWYORKER: Call the Doctor