man in white dress shirt wearing black sunglasses
man in white dress shirt wearing black sunglasses
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Published on Free to use under the Unsplash License

This Centers for Disease Control and Prevention (CDC) scientist was performing one of the last steps in a poliovirus testing process. Dyes are used to determine, which of the nucleotides (basis of genetic material) are present in a sequence. The outer coat of the virus (the capsid) is sequenced to find out where the virus has circulated.

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