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This article is essential for a progression of explainers on antibody improvement and dissemination. Take in additional about antibodies – from how they work and how they’re made to guaranteeing security and fair access – in WHO’s Vaccines Explained arrangement.

All infections – including SARS-CoV-2, the infection that causes COVID-19 – develop over the long haul. At the point when an infection duplicates or makes duplicates of itself.

it in some cases changes a tad, which is typical for an infection. These progressions are designated “transformations”. An infection with at least one new transformations is alluded to as a “variation” of the first infection.

At the point when an infection is broadly coursing in a populace and causing numerous diseases, the probability of the infection changing increments. The more chances an infection needs to spread, the more it imitates – and the more chances it needs to go through changes.

At the point when an infection is broadly flowing in a populace and causing numerous diseases, the probability of the infection changing increments. The more chances an infection needs to spread, the more it reproduces – and the more chances it needs to go through changes.

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