So the combination of our immunity waning and then the virus mutating means that future surges are unpredictable, we will need boosters again in the future -- probably later this year is my guess -- and they will need to be tweaked more closely to what the most recent strain is that's spreading.

Abraar Karan

Abraar Karan is an American global health physician and writer. He practices medicine at the Brigham and Women's Hospital and Harvard Medical School in Boston, Massachusetts. He was active in the COVID-19 epidemic response in Massachusetts and involved nationally through his contributions to lay press media platforms. He is a columnist at the British Medical Journal, a contributor at the National Public Radio, and regularly writes in the lay press.

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