WITH MILD SYMPTOMS AND HIGH CONTAGIOUSNESS, IT COULD BE LIKE NATURE’S OWN VACCINE: Is Omicron More Contagious Than Delta? A Virus Expert Explains What We Know So Far.

In fact, flash back to this story from just a few weeks ago: Scientists mystified, wary, as Africa avoids COVID disaster. Hypothesis: Omicron was already widespread in Africa months ago, producing no significant symptoms but immunizing a large swath of the population, all under the radar.