Virus may chauffeur useful 'packages' into plants

This time of year, the word "virus" conjures up a bedridden stint with coughs and chills -- something everyone goes to great lengths to avoid. But a new study shows that plant viruses may work like a trucking service loaded to carry freight to its destination. The idea is to have a virus do something good for us, like express a foreign protein and carry genetic information into a cell.

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