It certainly might not seem like it given the pandemic mayhem we’ve had, but the original form of SARS-CoV-2 was a bit of a slowpoke. After infiltrating our bodies, the virus would typically brew for about five or six days before symptoms kicked in. In the many months since that now-defunct version of the virus emerged, new variants have arrived to speed the timeline up. Estimates for this exposure-to-symptom gap, called the incubation period, clocked in at about five days for Alpha and four days for Delta. Now word has it that the newest kid on the pandemic block, Omicron, may have ratcheted it down to as little as three.
