Health
Covid: Is there a limit to how much worse variants can get? – BBC News
The coronavirus has changed and changed again, getting more transmissible each time.
By James GallagherHealth and science correspondent
image copyrightGetty Images
image captionOxygen cylinders in India, where the more transmissible Delta variant was first seen
It is clear we are now dealing with a virus that spreads far more easily – probably…
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