What is SARS-CoV-2?
SARS-CoV-2 is the virus and COVID-19 is the disease it can cause.
To better understand the difference between the 2 terms, try this: People can get a SARS-CoV-2 infection, and that leads to COVID-19. They have an infection by an infectious agent, not an infection by the disease which results from infection.
What the coronavirus, SARS-CoV-2 looks like up close
The images of SARS-CoV-2, the novel coronavirus that first appeared in humans in late 2019, were made using electron microscopy. The virus measures around 100 nanometers, and the smallest wavelengths of light that humans can see measure around 400 nanometers, meaning the virus is too small to see with a standard light microscope. To see something that small, you need a device that uses smaller wavelengths than light. Electrons, when accelerated in a field, behave as a wave with a tiny wavelength to accomplish this.
The Coronavirus Explained & What You Should Do
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What is COVID-19?