A revolutionary new laser technique has been developed by physicists from Arizona State University. This technique can be used to destroy viruses and bacteria without damaging human cells. Researchers are hopeful that it can stop the spread of hospital infections like MRSA. The result of the research has been published in the November 1 issue of the Institute of Physics' Journal of Physics: Condensed Matter.

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a. According to scientists, pulses from an infrared laser can be fine-tuned to discriminate between problem microorganisms and human cells.
b. Femtosecond laser pulses, through a process called Impulsive Stimulated Raman Scattering, produces vibrations in the protein coat of microorganisms.
c. This vibration destroys viruses and bacteria without damaging human cells.
d. This is because the structural compositions in the protein coats of human cells and bacteria and viruses are different.
e. Of course, the wavelength and pulse width has to be carefully selected so that it doesn't damage human cells.
f. It can be used in hospitals to disinfect blood supply or biomaterials.
g. It can also help in the treatment of blood-borne diseases such as AIDS and Hepatitis.