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Scoop.it!
Phages in mucus aid immune system by killing invading bacteria. ...animal mucus — whether from humans, fish or corals — is loaded with bacteria-killing viruses called phages. These protect their hosts from infection by destroying incoming bacteria. In return, the phages are exposed to a steady torrent of microbes in which to reproduce. 
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Scoop.it!
Some good vaccine news for a change: A vaccine against human papillomavirus (HPV) appears to be working. HPV causes genital warts, and can lead to cervical cancer in women.
Ed Rybicki's insight:
As we knew it would...B-)
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Amazing stuff - that animals can co-opt bacterial viruses as part of their innate immune systems! Thanks to Joann Passmore for pointing this out.