We're all excited to hear that this is immediately less severe in terms of disease, but do we know what the possibility of long COVID is? No, we don't. There hasn't been enough time (that has) passed to have any sense of whether omicron is associated with long COVID.

Bruce Walker

On the other hand, if some viruses sneak through and infect a cell ; then the body is dependent upon T cells to eliminate the virus, and therein lies the opportunity for us to rethink what we're doing in terms of vaccination -- because those T cells, at least theoretically, could be highly potent and could attenuate the disease. In other words, they wouldn't protect against infection, but they might make infections so asymptomatic that you would not notice it yourself and, in fact, you would never have enough virus in your body to transmit it to somebody else. That's the hypothesis.