On Dec. 13, 2021, researchers from the University of Oxford analysed the impact of the Omicron COVID-19 variant of concern on one of the immune responses generated by vaccination. The results, published in The Lancet, indicated that the Omicron variant had the potential to drive a further wave of infections, including among those already vaccinated, although the researchers highlight that there is currently no evidence of increased potential to cause severe disease, hospitalisations or deaths in vaccinated populations.