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- New Covid-19 subvariants can reinfect Omicron-recovered patients, early studies findSouth China Morning Post
- Are COVID surges becoming more predictable? New Omicron variants offer a hintnature.com
- Omicron’s Trajectory Shows Challenge of Maintaining Immune DefensesThe Wall Street Journal
- Results indicate that Omicron infection induces low levels of neutralizing antibodies in immunocompetent individualsNews-Medical.Net
- Two new Omicron sub-variants driving an increase in Covid cases in South Africa, WHO saysThe Independent