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WaitForItTheMongols t1_jdiz0hx wrote

Reply to comment by phred14 in What happened to the old COVID variants, like Delta? Could they come back? by number1dork

It's important what "immunity" you're referring to.

At this point with the number of variants, it's more helpful to think of COVID as a family of illnesses, rather than an illness. Immunity to other variants won't work against Omicron very well. But if you have immunity to Omicron, it works against Omicron.

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