Mice Immunized with the Weakened Mtase Mutant Virus or with a Placebo (IMAGE)
Caption
A plaque assay was used to test how much virus (visualized by the blue spots) was present in the blood of the mice. The placebo-treated mice were not protected and had virus in the blood, whereas the mice immunized with weakened MTase mutant virus were protected and had no virus in the blood.
Credit
A*STAR SIgN
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