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Viruses in the gut protect from infection—Phages in mucus aid immune system by killing invading bacteria.

Viruses in the gut protect from infection—Phages in mucus aid immune system by killing invading bacteria.

Looking uncannily like a collection of sushi, in fact this is a closeup of Smallpox viruses. The virus consists of genetic material (red), DNA (deoxyribonucleic acid), enclosed by a protein capsid (coat, yellow)

Looking uncannily like a collection of sushi, in fact this is a closeup of Smallpox viruses. The virus consists of genetic material (red), DNA (deoxyribonucleic acid), enclosed by a protein capsid (coat, yellow)