What we know about the Omicron variant | UNICEF https://www.unicef.org/coronavirus/what-we-know-about-omicron-variant?utm_source=facebook&utm_medium=paid-ad-en&utm_content=dark-dynamic&utm_term=supporter&utm_campaign=vaccine-equity-q4&fbclid=IwAR1gJthY684P-HgmbsFDBmrVGVxcFiIRgDTgsZX92LAa_C6MZ0cHHsg4j4Q