News South Africa finds omicron ‘highly transmissible’ and more resistant to COVID-19 vaccines December 14, 2021December 14, 2021Karen Weintraub and Elizabeth Weise, USA TODAYComments Off on South Africa finds omicron ‘highly transmissible’ and more resistant to COVID-19 vaccines The omicron variant is substantially more contagious and reduces the effectiveness of COVID-19 vaccines, according to a new South Africa study.