A New COVID-19 Challenge: Mutations Rise Along with Cases

Each new infection gives the virus a chance to mutate as it makes copies of itself, threatening to undo the progress made so far to control the pandemic.

  • Published 19 January 2021
FILE - In this Jan. 12, 2021, file photo a pharmacist draws saline while preparing a dose of Pfizer's COVID-19 vaccine in Sacramento, Calif. Mutations to the virus are rapidly popping up and the longer it takes to vaccinate people, the more likely it is that a variant that can elude current tests, treatments and vaccines could emerge. (AP Photo/Noah Berger, Pool, File)
Image via AP Photo/Noah Berger

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