In quickly moving scientific developments over the past 24 hours, three separate labs that tested the Omicron (B.1.1.529) COVID-19 variant against vaccines reported significant immune escape based on reduced antibody titers, which were followed by similar findings from Pfizer that also suggest a third dose shores up antibody titers.In other developments, the World Health Organization (WHO) in its weekly update today said global cases were at a plateau last week for the second week in a row, though cases rose sharply in Africa—especially in South Africa and neighboring countries.And at a briefing today, WHO officials said the Omicron variant has been detected in at least 57 countries so far.A flurry of immune escape cluesLast week, global