The Csis Podcast

Dr. Richard Lessells is among the exceptional South African experts on the front lines of discovering and investigating Omicron in South Africa. Alarm bells went off within the scientific community, as it became clear after just a few days that “an extraordinary number of mutations” are clustered in the key regions in the genome for immune protection and transmissibility. It was a “gut feeling. ” Omicron is highly transmissible, spreading very efficiently in a population with high levels of immunity gained from previous infection and in some cases from vaccination. How long to know just how dangerous Omicron is? It’s “too early to tell.” Lab work is underway to understand whether the virus affects T cells which are central to immune protection against severe disease. Why do we see such an unusual variant in South Africa? One theory, which Omicron may shed light on, is that the SARS-CoV-2 virus finds hosts who are very immune-compromised, persons living with HIV but not on anti-viral therapy. These individuals