The CDC has stated that “breakthrough” omicron cases are likely, but why? According to experts, vaccine efficacy is lower against omicron, due to the fact that omicron’s mutations make it more transmissible than other variants and more able to evade the passive immunity that is acquired from being vaccinated. Aren’t vaccines supposed to help, though? Yes, and they are. Our AFC Urgent Care Chattanooga team explains why below. What Are Breakthrough Cases? According ...