Published: Dec 24, 2020, 03:30 IST | Updated: Dec 24, 2020, 03:30 IST
Lockdowns have returned, contact tracing is on again. The mutant strains of the Wuhan virus are keeping the world on edge. Will the existing vaccine work against these far more potent variants? WION's Palki Sharma Upadhyay gets you a report.