Omicron vs delta variant - Omicron vs. delta: Can you tell which variant of COVID you have?

Meanwhile, fever, cough, and loss of smell were reported less often.

So, part of its enhanced transmissibility may come from its ability to evade some immune responses, especially in individuals who were previously infected but not vaccinated.

According to the study authors, if confirmed, these findings support the idea that Omicron's increased transmissibility could be due to the variant's ability to evade immunity—not some other characteristic that makes it inherently more contagious.

Louisiana State University Health Shreveport associate professor of microbiology and immunology Jeremy Kamil told this week that after examining B.