Covid 19-mutant-virus

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New COVID-19 challenge: Mutations on the rise, threat of new variants can grow with vaccination delays
science

New COVID-19 challenge: Mutations on the rise, threat of new variants can grow with vaccination delays

Health officials also worry that if the virus changes enough, people might get COVID-19 a second time.

COVID-19 research roundup: Mutant virus poses greater risk; why diseased lungs more susceptible; tackling sleep problems
World

COVID-19 research roundup: Mutant virus poses greater risk; why diseased lungs more susceptible; tackling sleep problems

Faced with health and economic anxiety during the coronavirus pandemic, many people are having trouble sleeping.