Gene sequencing helped to make COVID-19 the first outbreak to be tracked in near real-time on a global scale. Experts believe it could help save us from future outbreaks
The importance of genomic sequencing is undeniable. But how does it work—and how has it become so common?
First the RNA is converted to DNA. Then, like a long thread of cotton being pulled through a pinhole in a sheet of fabric, the DNA is pulled through a pore in a membrane. This nanopore is a million times smaller than a pinhead. As each building block of DNA passes through the nanopore, it gives off a unique signal. A sensor detects the signal changes, and a computer program decrypts this to reveal the sequence.
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