Question

what are the strains of corona virus​

Answer 1

Answer:

"Viruses are always changing, and that can cause a new variant, or strain, of a virus to form. A variant usually doesn’t affect how the virus works. But sometimes they make it act in different ways.

Scientists around the world are tracking changes in the virus that causes COVID-19. Their research is helping experts understand whether certain COVID variants spread faster than others, how they might affect your health, and how effective different vaccines might be against them.

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Answer 2

Answer:

A variant called B. 1.351, which first appeared in South Africa, may have the ability to re-infect people who have recovered from earlier versions of the coronavirus. It might also be somewhat resistant to some of the coronavirus vaccines in development.